Public bug reported:

I have a PC with Ubuntu10.04 and video card S3 VT8375 [ProSavage8
KM266/KL266] and I'm trying to run some 3D games with at least a
satisfactory performance, but I can not. I know that this chipset hasn't
a good 3D support in Linux, but I did a test with Linux Mint Debian
(LMDE) and the video came with a very acceptable performance, as this
comparison:

$ glxgears     (On Ubuntu 10.04)
299 frames in 5.0 seconds
347 frames in 5.0 seconds
373 frames in 5.0 seconds
378 frames in 5.0 seconds

$ glxgears      (On LMDE)
1249 frames in 5.0 seconds
1147 frames in 5.0 seconds
1107 frames in 5.0 seconds
1278 frames in 5.0 seconds

Furthermore, I discovered that Ubuntu doesn't use the correct driver for
the card for 3D acceleration and do insist on doing software
acceleration, which is slower than hardware acceleration:

$ glxinfo | grep render     (On Ubuntu)
direct rendering: Yes
OpenGL renderer string: Software Rasterizer

$ glxinfo | grep render     (On LMDE)
direct rendering: Yes
OpenGL renderer string: Mesa DRI ProSavageDDR 20061110 AGP 1x x86/MMX/SSE2

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xorg 1:7.5+5ubuntu1
Uname: Linux 2.6.32-27-generic i686
Architecture: i386
Date: Thu Jan 20 11:53:32 2011
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
ProcEnviron:
 LANGUAGE=pt_BR:pt:en
 LANG=pt_BR.utf8
 SHELL=/bin/bash
SourcePackage: xorg
Symptom: display
system:
 distro:             Ubuntu
 codename:           lucid
 architecture:       i686
 kernel:            2.6.32-27-generic

** Affects: ubuntu
     Importance: Undecided
         Status: New


** Tags: 3d acceleration dri hardware i386 lucid savage

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https://bugs.launchpad.net/bugs/705464

Title:
  Ubuntu 10.04 doesn't set hardware acceleration on ProSavageDDR video
  card

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