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[Marcos Felipe Mello <marcosfrm@xxxxxxxxx>]

I have a SiS 761GX board and the symptom is the same. Ubuntu uses by
default an odd resolution to my CRT monitor, 960x600, and 1024x768 isn't
available (despite being supported). The main problem should be the DDC
support broken of sis driver.

I found this old Debian bug, probably related:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473134

My Xorg log has these lines:

(II) SIS(0): VESA VBE DDC read failed
...
(II) SIS(0): Replaced entire mode list with built-in modes


Using another machine, with an i945G chip, plugged in the same monitor, all works ok. The resolutions are correctly configured (uses 800x600 by default) and I have 1024x768 as an option.

I'm attaching my log.

** Bug watch added: Debian Bug tracker #473134
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473134

** Attachment added: "Xorg.0_SIS.log"
   http://launchpadlibrarian.net/48606161/Xorg.0_SIS.log

-- 
GRAFIC HARDWARE NO SUPPORT UBUNTU BUG RESOLUTIONN
https://bugs.launchpad.net/bugs/577871
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