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Graphics Processing Unit
Type: S3 SuperSavage IX/C
Size: 14.1 inches, 16 MB of video RAM
Geometry: 1024×768 pixels, 16-bit color
Status: Works, with glitch. S-video jack not tested.
Problem: No graphics acceleration. Anything that requires animation (such as the "tuxkart" game) is horribly slow.
Fix: This one was nasty! It turns out that both Feisty Fawn and Etch were released with a defective driver for the savage GPU. For now, fixing this bug requires recompiling the affected modules (see Appendix A for gory details).
Test Result: "glxgears -printfps" now generates 2500 frames in five seconds! Tuxkart now looks good, as do YouTube videos.
Problem: Sometimes gets into a mode where moving the cursor around leaves a trail of garbage (looks like random data from another video page). Usually happens immediately after boot or resume. At one point I consistently saw this problem when starting "gdmflexiserver" for switching user logins?exiting from gdmflexiserver made the program go away, so clearly the driver is capable of getting back out of this mode!
Fix: (Open issue)
Non-problem: Some sources say that this display supports 24-bit color. But then glxgears produces only 1200 frames in 5 seconds, and most websites look exactly the same as in 16-bit mode (a few rare images that have noticable banding at 16 look better at 24), and tuxkart causes a system hang in the third lap.
Workaround: Stick with the 16-bit mode selected by Debian installer.
Note: The FN+F7 key-combo selects "VGA port", "VGA+LCD", then "LCD only". When not using the VGA port, this amounts to "LCD off", "LCD on (wasting extra power)", then "LCD on (efficient)".
Appendices
A. Recompiling the savage driver to enable graphics acceleration:
* Install Debian packages "linux-source-2.6.18", "gcc", "libc6-dev", "linux-headers-2.6.18-4-686", and "linux-kernel-headers".
* cd /usr/src/
* tar jxvf linux-source-2.6.18.tar.bz2
* cd linux-source-2.6.18
* cp /boot/config-2.6.18-4-686 .config
* make oldconfig && make prepare
* cd /lib/modules/2.6.18-4-686
* ln -s /usr/src/linux-source-2.6.18 build
* Download this package to ~/drm.tar.bz2
* cd
* tar jxvf drm.tar.bz2
* cd drm/linux-core
* make DRM_MODULES=savage
* mv /lib/modules/2.6.18-4-686/kernel/drivers/char/drm/savage.ko{,.old}
* mv /lib/modules/2.6.18-4-686/kernel/drivers/char/drm/drm.ko{,.old}
* cp {savage,drm}.ko /lib/modules/2.6.18-4-686/kernel/drivers/char/drm
* depmod -a
* Reboot
cat /proc/version
Linux version 2.6.18-4-686 (Debian 2.6.18.dfsg.1-12) (waldi@debian.org) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #1 SMP Mon Mar 26 17:17:36 UTC 2007cat /proc/version
Linux version 2.6.18-4-686 (Debian 2.6.18.dfsg.1-12) (waldi@debian.org) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #1 SMP Mon Mar 26 17:17:36 UTC 2007
Na, immer den jeweils aktuellen.Original von xsidWelchen Kernel empfiehlst Du?
