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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Radeon 7500: GPU lockup after starting Xorg"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94877#c10">Comment # 10</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Radeon 7500: GPU lockup after starting Xorg"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94877">bug 94877</a>
from <span class="vcard"><a class="email" href="mailto:macro@hotmail.com" title="macro@hotmail.com">macro@hotmail.com</a>
</span></b>
<pre>(start xorg)
(open window with a scrollbar-scrollable region e.g. web browser)
(start scrolling using scrollbar)
(viewport scrolls a centimeter or two)
(screen freezes)
(exception information appears in Xorg.0.log, see "Full Xorg.0.log
(radeon.agpmode=-1)" attachment)
(the folowing kernel messages appear)
Apr 10 09:53:57 [kernel] radeon 0000:00:10.0: ring 0 stalled for more than
10000msec
Apr 10 09:53:57 [kernel] radeon 0000:00:10.0: GPU lockup (current fence id
0x0000000000002424 last fence id 0x0000000000002425 on ring 0)
Apr 10 09:53:57 [kernel] radeon 0000:00:10.0: Saved 27 dwords of commands on
ring 0.
Apr 10 09:53:57 [kernel] radeon 0000:00:10.0: GPU reset succeeded, trying to
resume
Apr 10 09:53:57 [kernel] [drm] PCI GART of 512M enabled (table at
0x000000002EF00000).
Apr 10 09:53:57 [kernel] radeon 0000:00:10.0: WB disabled
Apr 10 09:53:57 [kernel] radeon 0000:00:10.0: fence driver on ring 0 use gpu
addr 0x0000000078000000 and cpu addr 0xeeea8000
Apr 10 09:53:57 [kernel] [drm] radeon: ring at 0x0000000078001000
Apr 10 09:53:57 [kernel] [drm:r100_ring_test] *ERROR* radeon: ring test failed
(scratch(0x15E8)=0xCAFEDEAD)
Apr 10 09:53:57 [kernel] [drm:r100_cp_init] *ERROR* radeon: cp isn't working
(-22).
Apr 10 09:53:57 [kernel] radeon 0000:00:10.0: failed initializing CP (-22).
(previous block of error messages repeats every 1-2 seconds forever, each time
screen flashes black then redisplays frozen screen contents, machine stays
responsive over SSH)</pre>
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