[Bug 23513] Radeon AGP KMS don't work or is too slow.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=23513

--- Comment #3 from gijs.hillenius at gmail.com <gijs.hillenius at gmail.com> 2011-02-09 23:16:22 PST ---
On the thinkwiki mailing list, there are a few more users reporting this,
including me.

Running Debian/testing & unstable (I guess that says enough) on a Thinkpad
Z61m.
which has a VGA compatible controller: ATI Technologies Inc Radeon Mobility
X1400. KMS is enabled by default on Linux kernel 2.6.32-5-68, and on
Testing/Unstable X (X.Org X Server 1.9.4) won't work if you disable it..

My previous work-around (disabling KMS in /etc/modprobe/radeon-kms.conf) had to
be undone.

It currently boots fine, but the screen will start flickering after a while.
Sometimes the flickering is so fast everything turns into a blur, and sometimes
you can still see what is on the screen..

Not sure what is the matter, but on the thinkwiki mailing list it was described
as: "The GPU loses somehow its synchronization over time."

It resets if I close the lid of the laptop. But it is no fun doing that every
30 seconds or so :-)...

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