Bug 16951

Summary: 1024x768 resolution incompatible with LCD monitor using Matrox G550 AGP
Product: xorg Reporter: Hugh Collins <catch>
Component: Driver/mgaAssignee: Tilman Sauerbeck <tilman>
Status: RESOLVED INVALID QA Contact: Xorg Project Team <xorg-team>
Severity: major    
Priority: medium    
Version: 7.3 (2007.09)   
Hardware: x86 (IA32)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
xorg logfile shows 1024x768 mode selected but only lower res work on monitor none

Description Hugh Collins 2008-08-01 10:50:44 UTC
Created attachment 18064 [details]
xorg logfile shows 1024x768 mode selected but only lower res work on monitor

This worked fine with xorg 7.2. Since upgrade to 7.3 (latest versions) the monitor reports "Input not supported".  Tried with another make of monitor,
and this one gives a black screen for 1024x768, lower res work OK.

Tried all the different 1024 mode lines I could find - none give screen on monitor. I even took the exact same modeline from my 7.2 system and forced
it in the config - no good.

Resolutions 832 and lower mostly work OK.  Bit fuzzy though since 1024 is the
monitors native resolution.

I am a software developer - any tips on how to diagnose the problem ?
Bit stuck - the VESA driver bombs with a "SetVBEMode" failure.

This system is a fresh install of Fedora Core 9, with xorg packages upgraded to the latest release.

Build ID: xorg-x11-server 1.4.99.905-2.20080702.fc9

(II) Module mga: vendor="X.Org Foundation"
        compiled for 1.4.99.902, module version = 1.4.9
Comment 1 Adam Jackson 2018-06-12 19:10:29 UTC
Mass closure: This bug has been untouched for more than six years, and is not
obviously still valid. Please reopen this bug or file a new report if you continue to experience issues with current releases.

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