ubuntu-x-swat team mailing list archive

[StefanPotyra <stefan.potyra@xxxxxxxxxxxxxxxxxxxxxxxxxx>]

Public bug reported:

Binary package hint: xserver-xorg-video-cirrus

Hi,

the GD 5446 uses 9 bits to store the pitch value, which then get shifted
by 3 bits to the left in the graphic card. For the resolution of
1360x768 however, X sets the pitch to 1408, which hence results to an
actual used pitch by the card of 128. As a result the screen is garbled.

While I don't have the real hardware to test it (a GD 5446 with 4 Mb is
somewhat rare), faumachine simulates exactly this graphic card. I've
tested this with a faumachine version from cvs, but I think the package
in the archives should show the same result.

Attached is the Xorg.0.log from inside the VM. I've also got a patch
ready for this, however that's completely untested so far (not even
checked if it compiles).

Cheers,
    Stefan.

** Affects: xserver-xorg-video-cirrus (Ubuntu)
     Importance: Undecided
         Status: New

-- 
pitch too high for CL5446 at 1360x768
https://bugs.launchpad.net/bugs/424354
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