[Bug 10436] New: Shearing on VGA outputs (DVI fine) with radeon driver on a RV100

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=10436

           Summary: Shearing on VGA outputs (DVI fine) with radeon driver on
                    a RV100
           Product: xorg
           Version: unspecified
          Platform: IA64 (Itanium)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: plasm at roo.me.uk
         QAContact: xorg-team at lists.x.org


Hello,

When running startx so the standard session with twm and the thatched
background is displayed what I can best describe as shearing occurs in the
background. The output is crystal clear when using DVI but exhibits this issue
when using the VGA port or a DVI->VGA converter. Using the vesa driver, this
problem does not appear on the VGA port. If while I get the shearing I run
something like dmesg in the xterm it looks like there is a problem with the
vertical sync and darker stripes appear and then disappear temporarily while
xterm is scrolling text... So I'm guessing the problem is with programming the
DAC somewhere...

I'm attaching logs of X.Org running with radeon and with vesa. The config for
the same is both, I just changed driver from radeon to vesa. The
HorizSync/VertRefresh is there only to force the vesa driver into 1280x1024
(for some reason it otherwise goes into 640x480); it has no effect on the
radeon driver's output.

>From lspci (problem happens with both cards):

06:02.0 VGA compatible controller: ATI Technologies Inc Radeon RV100 QY [Radeon
7000/VE]
07:01.0 VGA compatible controller: ATI Technologies Inc Radeon RV100 QY [Radeon
7000/VE]

Thanks!


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