[Bug 11801] New: Incorrect refresh rate with 9100 Pro IGP

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=11801

           Summary: Incorrect refresh rate with 9100 Pro IGP
           Product: xorg
           Version: 7.2
          Platform: x86 (IA32)
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: andreas at bawue.net
         QAContact: xorg-team at lists.x.org


Connecting a Samsung 930BF via DVI to an Asus Pundit R350 with a 9100 IGP
results in the display being driven with incorrect modes.

The graphic card is detected as follows by lspci:

01:05.0 VGA compatible controller: ATI Technologies Inc Radeon 9100 PRO IGP

The attached TFT display should be used at 1280x1024 at about 60 kHz refresh
rate.

The xorg.conf entry is accordingly set to have a Horizontal Sync of 31.5 - 67.0
kHz and a Vertical Refresh of 50.0 - 75.0 Hz.

When starting the xserver the display shows a message on the OSD saying:

"Not Optimum Mode
Recommended Mode: 
1280x1024 60Hz"

Taking a look at the OSD info screen shows the following:

Digital
32.2kHz 30Hz PP
1280x1024

It seems the radeon driver is being confused about the right way to drive the
display.

Fiddling with the Horizontal and Vertical settings or defining a Target Refresh
rate seem to have no affect.

Configuring the vesa driver instead results in a stable picture without
flickering and wobbling. Only drawback is the resolution of 1024x786 with the
vesa driver.


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