sis driver not support 1280x1024@75

[bart]

Binary package hint: xserver-xorg-driver-sis

the screen support 1280x1024@75 in the Xorg.log the modeline show this resolution but the image on the monitor (N71S) move

lspci show this:
VGA compatible controller: Silicon Integrated Systems [SiS] 661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter (rev 04)

ProblemType: Bug
Architecture: i386
Date: Mon Jun 11 09:45:44 2007
DistroRelease: Ubuntu 7.04
Package: hal 0.5.8.1-4ubuntu12
PackageArchitecture: i386
SourcePackage: hal
Uname: Linux ubuntu 2.6.20-15-generic #2 SMP Sun Apr 15 07:36:31 UTC 2007 i686 GNU/Linux

[Sitsofe Wheeler (sitsofe)]

I'm not sure that this is actually a duplicate of bug #3731 . I've used sis cards before and they put out some very strange default modelines. Things like the framebuffer will fail on LCD monitors due to "quirky" refresh rates being chosen by default. You don't get a crash, you just don't get a picture...

[Bryce Harrington (bryce)]

Okay, de-duping.

[Sergey Kiselev (skiselev)]

Could it be that you have a motherboard based on SiS662 chipset? (Like D201GLY)

Xorg driver has a known problem with this chipset. It will show noise (vertical lines, snow, etc.) then working in high resolution modes (like 1024x768 and 1280x1024). See this thread: http://ubuntuforums.org/showthread.php?t=463077

Workarounds / resolutions:
- Compile 'premium' sis driver from here: http://www.winischhofer.eu/linuxsispart4.shtml . Driver won't compile cleanly on Xorg 1.3.0, some modifications are required (use of XORG_VERSION_CURRENT >= XORG_VERSION_NUMERIC macros)
- Use binary driver, that was distributed by Intel (it was removed from their site, use Google's cache...)
- Use 'vesa' driver. It won't support XV or DRI, it's slower, but it works.

[Bryce Harrington (bryce)]

Hi gerardo-defelice,

Thank you for taking the time to report this bug and helping to make Ubuntu better. You reported this bug a while ago and there hasn't been any activity in it recently. We were wondering is this still an issue for you? Can you try with the latest development release of Ubuntu? (ISOs are available from cdimage.ubuntu.com)

If it remains an issue, could you also attach a new /var/log/Xorg.0.log?
Thanks in advance.

The output of lspci -vvnn would also be worth having.

[Bryce Harrington (bryce)]

We're closing this bug since it is has been some time with no response from the original reporter. However, if the issue still exists please feel free to reopen with the requested information. Also, if you could, please test against the latest development version of Ubuntu, since this confirms the bug is one we may be able to pass upstream for help.