Radeon mobility X300 with acceleration; right side of desktop, missing columns

[Alex Deucher]

On Thu, Nov 19, 2009 at 1:46 PM, Matthew Brett <matthew.brett at gmail.com> wrote:
> Hi,
>
>>> On one occasion this involved a scrambled screen on the right side of
>>> the external monitor; it always involves lost characters on emacs GTK
>>> screens (graphic attached).  On the graphic you can see the left hand
>>> emacs window showing the full text, and the right-hand window mainly
>>> blank, being truncated at a set position on the screen.
>>>
>>> I don't get this problem with the emacs-x11 (v22) build.   The same
>>> GTK build of emacs works without problem on an nvidia setup on a
>>> desktop elsewhere.
>>>
>>> I have a Radeon X300 in a Thinkpad T43 laptop, running default
>>> resolution on the LCD (left), VGA (right) of 1400x1050, 1920x1080
>>> respectively.
>>
>> Disable compiz.  The max texture size on your hardware is 2048x2048,
>> your desktop is larger than that, so the behavior beyond the limits is
>> undefined.
>
> Thanks for the reply - I appreciate it.   I believe compiz was not
> running (pgrep compiz ->'', gnome desktop effects disabled) but in any
> case, I have the same effect with all compiz packages uninstalled,
> even after a reboot,

File a bug and attach your xorg log and config:
https://bugs.freedesktop.org

Alex