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

[Matthew Brett]

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,

Cheers,

Matthew