[Bug 19960] New: radeon{,hd} driver can't run a LCD at certain resolutions/ timings over DVI

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=19960

           Summary: radeon{,hd} driver can't run a LCD at certain
                    resolutions/timings over DVI
           Product: xorg
           Version: 7.4
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: roysjosh at gmail.com
         QAContact: xorg-team at lists.x.org


Created an attachment (id=22604)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=22604)
a Xorg log from yesterday

I'm running F10 x86_64 with:

01:05.0 VGA compatible controller: ATI Technologies Inc Radeon HD 3200 Graphics
xorg-x11-server-Xorg-1.5.3-6.fc10.x86_64
xorg-x11-drv-radeonhd-1.2.4-1.1.20081212git.fc10.x86_64
xorg-x11-drv-ati-6.9.0-63.fc10.x86_64

Motherboard is ASUS M3A78-EM.  In the manual it says:  "Supports DVI with max.
resolution up to 2560 x 1600 @60Hz"
Monitor is ASUS VH226H.  In its manual it says:  "1920 x 1080. Horiz: 67.50KHz,
Vert: 60.0Hz, Pixel: 148.50MHz"

The drivers seem to see the correct ModeLine...
(II) RADEON(0): Modeline "1920x1080"x60.0  148.50  1920 2008 2052 2200  1080
1084 1089 1125 +hsync +vsync (67.5 kHz)
... but, running at that resolution produces horrible horizontal flickering
lines.  The monitor blacks out rather frequently.  I have tried this monitor on
a XP computer and it works fine.  I have tried a 17" running at 1440x900 on my
computer and it works fine.  I have tried both the radeon and radeonhd driver.

I don't have a xorg.conf (at least, when I want the flickering; right now I
force it to a mode that works).

I'll attach a Xorg.0.log using the radeon driver.  In this particular log I am
forcing the display to 1024x768 at 75.  The display is currently running at
1280x960 at 60.  A few other modes work as well, but the majority have flickering.

Some sites I think are related:
https://bugs.freedesktop.org/show_bug.cgi?id=8790
http://www.hardforum.com/showthread.php?t=1286375
http://www.avforums.com/forums/lcd-televisions/728169-sony-1080p-horizontal-flicker.html

Thanks for your time.


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