https://bugzilla.novell.com/show_bug.cgi?id=743956
https://bugzilla.novell.com/show_bug.cgi?id=743956#c3
Holger Arnold changed:
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CC| |holgerar@googlemail.com
--- Comment #3 from Holger Arnold 2012-02-11 13:19:08 UTC ---
I think I have the same or a closely related problem under Gnome 3.2 (using
Gnome Shell, not the fallback mode) and KDE 4.x on a Laptop with a ATI Mobility
FireGL T2 card (RV350 chip), using the kernel radeon driver (tested on openSUSE
and vanilla kernels up to 3.2.4):
Whenever I open a menu in an application, the menu window is first filled with
garbage before the real menu contents are drawn. Some things I noted:
- The "garbage" is not completely random, but always uses the same colors as
the menu. This indicates that memory positions are computed incorrectly when
copying the window contents from one buffer to another.
- For most menus, this happens only when the menu is opened for the first time;
afterward, the menu appears immediately. After closing the menu and doing
other things for some time, the problem occurs again. This indicates that
drawing a window works as long as the contents of the menu window are cached on
the graphics card, which could mean that the source of the bug is in the
transfer from system memory to graphics memory.
- Top-level windows, pop-up windows provided by Gnome Shell (for example, the
calendar window), and the window menus that are opened by right-clicking on the
window title bar (which are supposedly drawn by the Mutter window manager) are
not affected.
- As it occurs under KDE and Gnome (but not under non-compositing window
managers), the problem is probably either a bug in the kernel driver, in the X
server, or in one of the supporting libraries.
- The problem does not occur under Fedora 16. Since the Fedora kernel does not
include any patches related to the radeon driver or memory management, this
makes it less likely that the problem is caused by a kernel bug.
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