Red Hat Linux 7.3 on HP omnibook xe4500

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• CPU: Mobile Intel(R) Pentium(R) 4 - M, 1.7GHz
• Cache: 512KB L2
• Chipset: ALi M1671 (Aladdin-P4)
• IDE controller: ALi M5229 (ALi 15X3)
• Hard disk: 30GB HITACHI DK23EA-30 UDMA 100
• Combo DVD-CDRW: TOSHIBA SD-R2312 (Firmware 1905)
• RAM: 256MB DDR-SDRAM@266MHz
• Display: 14.1" TFT XGA (1024x768)
• Graphics: ATI Radeon Mobility M6 LY (AGP) with 32MB DDR-RAM
• Sound: ALi M5451
• USB: ALi OHCI USB 1.1 Controller, 2 ports
• Network: NatSemi DP83815 10/100 Mbit/s
• Floppy drive

• Parallel: 25 pin bi-directional ECP/EPP
• Serial: 9 pin RS-232
• Infrared: ALi M5123, 4Mbps
• Firewire: Texas Instruments IEEE1394 TSB43AB21
• VGA: 15 pin
• S-Video TV-out
• Headphone-out: 3.5mm
• Microphone-in: 3.5mm
• Modem: ALi M5457, RJ-11 Jack
• LAN: RJ-45 Jack
• 2x PCMCIA
• Docking port

• /proc/cpuinfo
• lspci -vv
  
  
• lspci -vv (before repair, some parts were exchanged!)

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• Hard disk error messages when installing/loading Linux
  I didn't experience this problem, so I can't say anything about that
  • See [1], [2] for more information & solutions
    
    
• Terminal keyboard lockups (Update 23.07.03: fixed, thanks to Erik Frederiksen!)
  
  • disable USB legacy support in BIOS
  • the kernel loaded awfully slow when I disabled USB legacy support in BIOS(?!). The 'compact' option in lilo.conf fixed this
  [ Old text:
  • give kernel option 'nousb' when booting. USB support seems to be broken for the xe4500 (kernel 2.4.18 & 2.4.20).
    To make this kernel option resident, add it to the Linux boot loader config.
  • with kernel 2.4.18: disable gpm (mouse support for terminal):
    '/sbin/chkconfig gpm off' ]
  
  
• Screen display flickers
  When X starts up or when switching X-Server <-> terminal (with <CTRL>+<ALT>+<associated function keys>) the screen display flickers
  • update the kernel to at least 2.4.22
  • use a recent version of XFree86 (4.3.0-42 from Fedora works fine. Maybe some earlier 4.3.0 releases work too...)
  
  
• X-Server lockups
  
  • with XFree86 4.2.0: disable FBDEVHW and DRI support in /etc/X11/XF86Config-4
    (comment out the corresponding 'Load' instructions in 'Section "Module"')
  
  Lockups are gone with XFree86 4.2.99 (i.e. FBDEVHW and DRI work!)
  
  
• Long delay until X-Server starts, all keyboard LEDs are on (experienced with XFree86 4.2.99 & kernel 2.4.18)
  • upgrade to the latest kernel (2.4.20 solved the problem here)

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• SP23322 on 08.01.03 at ftp://ftp.hp.com/pub/softlib/software1/COL2189/ob-9940-1/ (dead)
• SP23460 on 22.01.03 at ftp://ftp.hp.com/pub/softlib/software1/COL2189/ob-9940-2/ (dead)

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        Partition	Size	File system			Description                                                                         
        /dev/hda1	 20MB   IBM Thinkpad hibernation	Hidden HP Diag Tools partition                                                      
        /dev/hda2	  5GB   NTFS				WindowsXP                                                                           
        /dev/hda3	 24GB   Win95 Ext. (LBA)		Extended partition that holds the following partitions                              
          /dev/hda5	  5GB   Linux ext3			Linux / partition                                                                   
          /dev/hda6	128MB   Linux Swap			Linux swap partition                                                                
          /dev/hda7	  8GB   Win95 FAT32			 8GB space for data; FAT32 because Linux NTFS write support is experimental!        
          /dev/hda8	 10GB   Win95 FAT32			10GB space for data; FAT32 because Linux NTFS write support is experimental!        
                                                                                                                                                    

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• Select IMPS/2 as the mouse protocol
• Do a laptop-installation. Optionally deselect unwanted packages (my installation without Gnome takes about 2GB disk space).
• When configuring the X-Server, select "Generic Laptop Display Panel 1024x768".
• The installer lets you choose the boot loader for Linux, either GRUB or LILO. I chose LILO because I'm more familiar with it. Install to the MBR (Master Boot Record) of the hard disk. As a consequence you won't be able to start the HP diag tools by pressing <F10> from BIOS splash screen. But there's a solution, see Re-enable HP Diag Tools below.

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• Go to http://www.kernel.org and download the latest stable kernel (that was 2.4.20 for me)
• Extract the kernel archive to /usr/src
• If you want to have the latest up-to-date kernel apply the lastest kernel pre-patch (may be necessary for ACPI patch)
• Apply the ACPI patch from http://acpi.sourceforge.net, required for working touchpad on/off button, power off, battery status
• If you want software suspend support you should install the patch from http://swsusp.sourceforge.net/. Also see my software suspend section.
• As a starting point for a kernel configuration file take the provided file from kernel-source RPM. Copy '/usr/src/linux-2.4.18-3/configs/kernel-2.4.18-i686.config' to '/usr/src/linux/.config'. Some suggested options that should be enabled: PentiumIV optimization, ACPI, NTFS file system support (read-only). Some suggested options that should be disabled: Local APIC support on uniprocessors (prevents hangs with newer ACPI patches).
• cd to /usr/src/linux and type 'make oldconfig' to configure the new kernel options & drivers
• type 'make dep' to create the required depedencies
• compile a compressed kernel and the kernel modules with 'make bzImage && make modules'
• when everything went fine install the modules with 'make modules_install'
• copy 'System.map' to '/boot/System.map-2.4.20'
• copy 'arch/i386/boot/bzImage' to '/boot/vmlinuz-2.4.20'
• create an initial ramdisk image with '/sbin/mkinitrd /boot/mkinitrd.img-2.4.20 2.4.20'
• cd to /boot and do

                                                    
          ln -s System.map-2.4.20 System.map        
          ln -s vmlinuz-2.4.20 vmlinuz              
          ln -s initrd.img-2.4.20 initrd.img        
                                                    

• type '/sbin/lilo' to update LILO
• reboot and pray that your system will boot :-) (that's why you created a boot disk during installation, or didn't you?)

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        (WW) RADEON(0): [dri] Some DRI features disabled because of version mismatch.                         
                        [dri] radeon.o kernel module version is 1.1.1 but 1.3.1 or later is preferred.        
                                                                                                              
        (II) RADEON(0): [drm] failure adding irq handler, there is a device already using that irq            
                        [drm] falling back to irq-free operation                                              
        (II) RADEON(0): [drm] Kernel module too old (1.1) for agp heap manager                                
                                                                                                              

• download radeon-xxxxxxxx-linux.i386.tar.bz2 (it was radeon-20030407-linux.i386.tar.bz2 with radeon.o kernel module 1.8 for me) and extract it to a temporary directory, e.g. /tmp
• cd /tmp/dripkg/drm
• make -f Makefile.linux
• copy the new radeon.o driver to the kernel module directory, that is e.g. /lib/modules/2.4.20/kernel/drivers/char/drm/
• /sbin/depmod -a
• switch to console and shut down X with 'telinit 3'
• '/sbin/rmmod radeon' to unload the old radeon kernel module
• restart X with 'telinit 5'

                                                                                  
        (II) RADEON(0): [drm] dma control initialized, using IRQ 9                
        (II) RADEON(0): [drm] Initialized kernel agp heap manager, 5111808        
                                                                                  

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• Full screen terminal
  Adding 'vga=790' to '/etc/lilo.conf' gives a VGA resolution of 1024x768 pixels with 32768 colours (VESA frame buffer). Don't forget to update LILO with '/sbin/lilo' after changing the configuration!
  
  The radeon frame buffer module (radeonfb) 1.8.0-ben of kernel 2.4.22 that could be used too does not work well (strange artifacts when rebooting, drawing in frame buffer seems to broken sometimes).
  
  
  
• Enable DMA for HD and CD-RW/DVD Combo drive
  Update: DMA enabled for the hard disk on kernel boot was fixed in a pre-version of kernel 2.4.21. DMA for CD drives is disabled by default with the rc.sysinit script from Red Hat to avoid possible problems!
  
  DMA (Direct Memory Access) is disabled and causes poor hard disk & CD-RW performance. So far I've had no problems with enabled DMA setting so here's the description how to enable it:
  /etc/sysconfig/harddisks contains parameters to enable/disable some functions for ALL IDE drives of the system
  A second possibility is separate parameter files for each drive, so we need a file for /dev/hda (HD) and /dev/hdc (CD-RW/DVD combo) that enable DMA. The advantage of this possibility is that if you experience problems later you can disable DMA separately for each drive.
  
  
  • cd to /etc/sysconfig
  • move 'harddisks' to 'harddiskhda'
  • edit 'harddiskhda' and uncomment USE_DMA=1
  • copy 'harddiskhda' to 'harddiskhdc'
  
  To activate the changes reboot and you should see
  Setting hard drive parameters for hda: [ OK ]
  Setting hard drive parameters for hdc: [ OK ]
  Verify the DMA setting with hdparm: type '/sbin/hdparm /dev/hda' and '/sbin/hdparm /dev/hdc'; 'using_dma = 1 (on)' should be shown for each drive
  Speed: '/sbin/hdparm -t /dev/hda' shows ~28MB/sec for my HITACHI DK23EA-30 hard disk with enabled DMA
  
  
  
• Battery status display
  aKpi - a QT/KDE acpi frontend works fine for me
  Binary & source RPMs:
  akpi-0.4-1.i686.rpm (71 KB)
  akpi-0.4-1.src.rpm (643 KB)
  
  akpi-0.3.4-1.i386.rpm (92 KB)
  akpi-0.3.4-1.i686.rpm (92 KB)
  akpi-0.3.4-1.src.rpm (53 KB)
  
  Another nice program to display the battery status is wmacpi
  Binary & source RPMs:
  wmacpi-1.34-2.i386.rpm (14 KB)
  wmacpi-1.34-2.i686.rpm (14 KB)
  wmacpi-1.34-2.src.rpm (18 KB)
  
  
  
• Enable the five One-Touch buttons and the audio buttons
  Some of the One-Touch buttons work without further actions, some have to be activated. This will be done by the omnibook kernel module.
  • Go to http://sourceforge.net/projects/omke and download the omnibook source tarball
  • compile the source and install the module ('make && make install')
  • add 'modprobe omnibook' to /etc/rc.rc.local so it will be loaded on bootup
  • add the following lines to /etc/X11/Xmodmap that map the One-Touch & audio buttons keycodes to function keys F13->F20:

                                     
            keycode 236 = F13        
            keycode 243 = F14        
            keycode 178 = F15        
            keycode 241 = F16        
            keycode 240 = F17        
            keycode 160 = F18        
            keycode 174 = F19        
            keycode 176 = F20        
                                     

  • either type 'modprobe omnibook' and restart X or reboot to activate the changes
  • to test if it works type 'xev' that will show received X events. Try the One-Touch and audio buttons. For each pressed key you should see a KeyPress and a KeyRelease event that should look something like this (example output for the "mail" button F13):
    

                                                                                 
            KeyPress event, serial 22, synthetic NO, window 0x2a00001,           
            root 0x48, subw 0x0, time 11773632, (68,145), root:(904,180),        
            state 0x0, keycode 236 (keysym 0xffca, F13), same_screen YES,        
            XLookupString gives 0 bytes:  ""                                     
                                                                                 
            KeyRelease event, serial 22, synthetic NO, window 0x2a00001,         
            root 0x48, subw 0x0, time 11773643, (68,145), root:(904,180),        
            state 0x0, keycode 236 (keysym 0xffca, F13), same_screen YES,        
            XLookupString gives 0 bytes:  ""                                     
                                                                                 

  • to associate KeyPress events with actions I use xevact. After X login xevact should be started from a startscript or autostart folder depending on the desktop environment.
    I've created binary & source RPMs:
    xevact-1.0d-2.i386.rpm (11 KB)
    xevact-1.0d-2.i686.rpm (11 KB)
    xevact-1.0d-2.src.rpm (42 KB)
    
    And here is a configuration example for xevact that associates
    • the "mail" button (F13) with no action
    • the "tv" button + Control (F14+Control) with Konsole
    • the "tv" button + Shift (F14+Shift) with KWrite
    • the "tv" button (F14) with Konqueror
    • the "www" button (F15) with Mozilla
    • the "lock" button (F16) with xscreensaver that blanks and locks the screen
    • the "help" button (F17) with no action
    • the "mute" button (F18) with aumix that sets audio volume to 0
    • the "-" button (F19) with aumix that decreases audio volume by 5
    • the "+" button (F20) with aumix that increases audio volume by 5

                                                                                                          
            KeyPress - 0,0 1 Test_KeyCode "F13" NoAction                                                  
            KeyPress S 0,0 2 Test_KeyCode "F14" Test_State Control System /usr/bin/konsole &              
            KeyPress S 0,0 2 Test_KeyCode "F14" Test_State Shift System /usr/bin/kwrite &                 
            KeyPress - 0,0 1 Test_KeyCode "F14" System /usr/bin/konqueror &                               
            KeyPress - 0,0 1 Test_KeyCode "F15" System /usr/bin/mozilla &                                 
            KeyPress - 0,0 1 Test_KeyCode "F16" System /usr/X11R6/bin/xscreensaver-command -lock &        
            KeyPress - 0,0 1 Test_KeyCode "F17" NoAction                                                  
            KeyPress - 0,0 1 Test_KeyCode "F18" System /usr/bin/aumix -v 0 &                              
            KeyPress - 0,0 1 Test_KeyCode "F19" System /usr/bin/aumix -v -5 &                             
            KeyPress - 0,0 1 Test_KeyCode "F20" System /usr/bin/aumix -v +5 &                             
                                                                                                          

  
  
  Another program you may want to take a look at: xhkeys (not tested!)
  
  
  
• DVD, media & audio playback
  
  • DVD: Red Hat 7.3 comes with xine DVD player, but you have to install some additional libraries to be able to play encrypted DVDs.
    Download and install the following libraries (in this order):
    
    • libdvdcss
    • libdvdread
    • libdvdnav & xine-dvdnav - Attention: the version number of xine-dvdnav must match the version number of xine!
  • Media: A good media player that will play almost every media format is mplayer
  • Audio: Red Hat 7.3 comes with xmms, the X MultiMedia System that plays the most common audio formats
  
  
  
• Modem
  Update 11.11.03: With v6.00+ Linuxant decided to release 2 versions of the modem driver: a free version limited to 14.4 Kbps and a full version with 56 Kpbs and fax support. You can still try a Google search to find the old free hsflinmodem driver v5.xx that works at full speed 56 Kbps.
  
  Modem works with HSF softmodem kernel modules from http://www.linuxant.com/drivers/hsf/
  
  
  
• Infrared port/IrDA (19.11.2003)
  
  The infrared device controller is an ALi M5123 FIR (Fast InfraRed).
  
  
  • SIR mode - tested, works
    
    Can be configured with the irda-utils packages. It contains all startup scripts to enable the infrared device in SIR mode. /etc/sysconfig/irda has to adjusted:

                                                                                                                          
              [...]                                                                                                         
              DEVICE=/dev/ttyS1
              [...]                                                                                                         
              

  
  
  • FIR mode - not tested
    
    
    • If the serial port driver is built into the kernel the infrared io-port will be allocated by the serial driver when booting the system (if the serial driver is a kernel module you can continue with modprobe, see below). 'dmesg' (/var/log/dmesg) should give you something like the output below:

                                                                                                                            
                  [...]                                                                                                         
                  Serial driver version 5.05c (2001-07-08) with MANY_PORTS MULTIPORT SHARE_IRQ SERIAL_PCI ISAPNP enabled        
                  ttyS00 at 0x03f8 (irq = 4) is a 16550A                                                                        
                  ttyS01 at 0x02f8 (irq = 3) is a 16550A                                                                        
                  [...]                                                                                                         
                                                                                                                            

      ttyS0 at 0x03f8 is the serial port on the backside, port at 0x02f8 is the infrared port that we want to be controlled by the ali-ircc driver.
    • Next step is to unload the serial driver/device ttyS1:

                                                                   
                  setserial /dev/ttyS1 uart none port 0x0 irq 0        
                                                                   

    • Now the infrared port at 0x02f8 can be used by the ali-ircc driver:

                                             
                  /sbin/modprobe ali-ircc        
                                             

      The syslog (/var/log/messages) should show something similar like below:

                                                                                   
                  kernel: ali-ircc, driver loaded (Benjamin Kong)                      
                  kernel: IrDA: Registered device irda0                                
                  kernel: ali_ircc_open(), ali-ircc, Found dongle: HP HSDL-3600        
                                                                                   

    • The infrared device irda0 should be ready now.
      You can put the commands above in the startup script /etc/rc.d/rc.local so that the infrared port will be enabled every time you boot the system.
      
      
  For more information about Linux and infrared see the Infrared-HOWTO.
  If you want to exchange files with Windows take a look at ircp of the OpenOBEX package.
  
  
  
• Software suspend (22.11.2003)
  
  Software suspend (the Linux equivalent of Windows' hibernate functionality) from http://swsusp.sourceforge.net/ works for me out of the box (swsusp-2.0 kernel patch).
  Be sure to disable DRI (comment the line 'Load "dri"' in XF86Config-4) if you want to suspend from X because DRI hangs the X server when resuming.
  You can take a look at http://cpbotha.net/dri_resume.html for more information about software suspend & Radeon DRI
  
  For more information see:
  Software Suspend HOWTO
  Software Suspend FAQ
  
  acpid can be used to monitor ACPI events, e.g. power button press, battery status, and then start hibernation.
  Here are my config files (they reside in /etc/acpid/events):
  power_button: hibernate if power button is pressed
  bat1: check battery status
  
  battery.sh: shell script, that parses remaining capacity of the battery and if the capacity is below a certain level (here: 300 mAh) the script starts hibernation
  
  
  
• Processor speed selection (22.11.2003)
  
  The Intel Mobile Pentium 4 processor speed can be set to 1700 MHz or 1200 MHz (lower power consumption!). This is done by changing the performance state via /proc/acpi/processor/CPU0/performance:
  
  

  • 'echo "0" > /proc/acpi/processor/CPU0/performance' sets state P0: 1700 MHz, 20000 mW, 250 uS
  • 'echo "1" > /proc/acpi/processor/CPU0/performance' sets state P1: 1200 MHz, 10000 mW, 250 uS
  
  
  
• PCMCIA/Cardbus (02.08.2004)
  
  The xe4500 has a Texas Instruments PCI1250 PC card Cardbus Controller that is controlled by the yenta_socket driver. To enable PCMCIA the /etc/sysconfig/pcmcia file must be edited.
  But first an update of the kernel-pcmcia-cs package to 3.1.31-9 from Red Hat 8.0 is recommended, because the cardmgr command that initialises the PCMCIA slots caused error messages and a beep on bootup which is fixed with the update.
  
  The /etc/sysconfig/pcmcia file should look like this:

                             
        PCMCIA=yes           
        PCIC=yenta_socket    
        PCIC_OPTS=           
        CORE_OPTS=           
        CARDMGR_OPTS=-f      
                             

  
  Now the PCMCIA slots will be initialised automatically on bootup or it can be done manually with '/sbin/service pcmcia start'.
  
  
  
• Re-enable the HP Diag Tools
  Because of installing LILO in the MBR (Master Boot Record) of the hard disk, the HP Diag Tools can't be executed any more. It looks like the boot code in the original MBR is responsible for checking whether the BIOS has set a flag that <F10> was pressed, for unprotecting the first partition and for booting the Diag Tools or, if <F10> was not pressed, the second partition (WindowsXP).
  
  The trick is, that the Diag Tools partition is actually a FAT16 partition that can be booted by LILO! So let's re-enable the Diag Tools:
  
  • start Linux fdisk: '/sbin/fdisk /dev/hda'
  • enter 't' to change the file system type of a partition
  • enter '1' to select the first partition
  • enter hex code '6' (=FAT16) for the new file system type
  • enter 'w' to write back the partition table to hard disk and to exit fdisk
  • reboot the system
  • add the following entry to '/etc/lilo.conf':

                                      
            other=/dev/hda1           
                optional              
                label="hpdiag"        
                                      

  • update LILO with '/sbin/lilo'
  • reboot the system and you should be able to select and start the Diag Tools from LILO
  
  Some notes for WindowsXP:
  • When booting WindowsXP it assigns a drive letter for the Diag Tools partition now, because it is never hidden! Remove the drive letter from the Diag Tools partition with the device manager (or whatever it is called...)
  • In C:\DMI\HPDIAGS there is a tool HPSUPPT.EXE that is destined to copy the diagnostic results (aka "support ticket") from the normally hidden partition to the WindowsXP partition. This tools doesn't work anymore with the changed file system type, but it isn't required anyway. If you want to copy the "support ticket" simply assign a drive letter to the Diag Tools partition, copy HPSUPPT.TXT (the "support ticket") to wherever you like and then remove the drive letter again to hide the partition for WindowsXP.

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• hard disk (of course :-) )
• touchpad, scrollpad (requires IMPS/2 protocol for X), click buttons, touchpad on-off button (requires ACPI)
• the five One-Touch buttons
• audio: volume up/down/mute buttons on the left side and the corresponding function keys (<fn>+<page up>, <fn>+<page down>, <fn>+<backspace>)
• network port
• mouse on PS/2 port
• floppy drive
• CD-RW/DVD combo drive: data CD/DVD, audio CD playback with kscd, audio ripping with cdparanoia & cdrdao (generic-mmc driver), DVD playback with xine & mplayer
• CD burning: tested with cdrdao (generic-mmc/generic-mmc-raw drivers)
• audio: trident & ac97_codec modules are used
• audio: playback with internal speakers
• audio: headphone port
• audio: microphone port
• switching of X display resolutions: works with <+> & <-> on keypad (hint: <fn>+<f8> locks/unlocks keypad!)
• brightness of TFT display: can be adjusted with function keys <fn>+<f1> & <fn>+<f2>
• S-Video port (TV output, PAL): works with atitvout and forced Rage Mobility/Rage 3D Pro LT mode (option -f), requires an S-Video to Composite video adapter for colour output.
• external monitor port: works, atitvout may be useful for switching displays
• working modes with atitvout:
  • LCD only
  • CRT only
  • TV only
  • LCD & CRT
  • CRT & TV; the resolution of the CRT changes with TV output enabled at the same time, maybe that's the reason why the LCD stays black when trying to use LCD & TV
  There's a Linux TV-out HowTo that discusses TV-out for several video cards.
• modem: works
• USB: works with USB legacy support option turned off in BIOS (avoids keyboard lockups). Be sure to give option 'compact' for LILO, otherwise the kernel loads awfully slow(?!)
• PCMCIA: works
• system reboot: works
• system power off: works with ACPI patch
• Infrared port: works in SIR mode. Is recognized by the ali-ircc driver and should work with that in FIR mode (not tested).

• IEEE 1394 port: not tested yet
• Serial/parallel port: not tested yet, but I guess these work (ancient standard ports :-) )
• Starting HP's Diag Tools from BIOS splash screen with <F10> doesn't work because of the Linux bootloader sitting in the MBR instead of HP's Diag Tools loader

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• the people of the HP Omnibook Mailing List
• the authors of other Linux on xe4500 pages for great information (links below!), especially Martin Johnson, Jari-Pekka Heini, Marc Villegas
  Some day, Linux will work perfectly on all our xe4500s! :-)

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• Red Hat Linux 7.3/8.0/9.0, SUSE Linux 9.0 on xe4500 by Martin Johnson
  http://www.net42.co.uk/linux-on-xe4500.shtml
  
• Red Hat Linux 8.0 on the HP Omnibook xe4500 by Marc Villegas
  http://www.utc.fr/~villegas/docs/xe4500/
  
• Debian on xe4500 by Jari-Pekka Heini
  http://www.cc.jyu.fi/~jajuhein/xe4500/debian-on-xe4500.html
  
• Linux on xe4500 by Alexander Meindl
  http://alex.meindlsoft.net/index.php?kb_id=201
  
• omnibook kernel module and other things
  http://sourceforge.net/projects/omke
  
• HP Omnibook Mailing List
  http://zurich.ai.mit.edu/mailman/listinfo/omnibook
  
• Linux on HP laptops
  http://www.linux-on-laptops.com/hp.html
  
• ATI: Linux and XFree86 Information
  http://www.ati.com/support/faq/linux.html
• HP: technical support - hp omnibook xe4500
  http://h20000.www2.hp.com/bizsupport/TechSupport/Home.jsp?prodSeriesId=83757&prodTypeId=12454
• xe4500 Crash Site (site that addresses the 'HP OmniBook xe4500 with ATI Radeon M6 instability problem' under WindowsXP)
  http://www.xe4500-crash.com/
• Omnibook xe4500 Service Manual
  http://www.martini-man.com/pub/manuals/t_4500.pdf
• Omnibook xe4500 disassembly
  http://www.pbase.com/schultz_dk/hp_omnibook_xe4500
• Some wallpapers for HP omnibook
  http://www.schultz-net.dk/wallpapers.html

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