SiS 65x/M650/740 works strangely on high resolution

Bug #920936 reported by Arie Skliarouk on 2012-01-24
This bug affects 1 person
Affects Status Importance Assigned to Milestone
xserver-xorg-video-sis (Ubuntu)

Bug Description

SiS 65x/M650/740 VGA adapter works strangely on high resolution.

The 1680x1050 LCD monitor is connected using DVI cable. It works properly on 1280x960 resolution.
If I choose 1680x1050, weird things happen:
 * mouse pointer disappears at certain screen areas and becomes visible on other ones
 * The mouse pointer can not reach the most topmost pixels and stops in 5 mm from there. Somehow clicks works properly even if the mouse pointer appears not to be there

This is on ubuntu oneiric 11.10 i386.
# dpkg -l | grep xserver-xorg-video-sis
ii xserver-xorg-video-sis 1:0.10.3-3 X.Org X server -- SiS display driver

The card is allocated 32MB of memory (from the BIOS).

Attached to the bug the /var/log/Xorg.log.0 file.

Arie Skliarouk (skliarie) wrote :
Arie Skliarouk (skliarie) wrote :

The card works properly with the same LCD on other resolutions: 1400x1050, 1600x1200, 1680x1200...

It just the native resolution of the LCD (1680x1050 16:9) that does not work properly.

SignedAdam (signedadam) wrote :

Im having big problems with my sis card, it's a 65x, on bored, at 1024 x 768, it says its a lap top, but its a desktop computer made by Packard bell, when i open a video, i see about 2 seconds of it, then it gos blank, snapping windows does not work, i move a window to the left, it dont snap, i dont see any boot screen, up on power on, id relly like this fixing in ubuntu 12.04

bugbot (bugbot) on 2012-05-31
tags: added: oneiric
Harvey Partridge (harveyp) wrote :

@SignedAdam -I have the same vid card and the same problem on U12.04LTS. Did you find a fix or workaround?

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