Comment # 211
on bug 79980
from Jacob
I looked back through kern.log and found the last time I encountered a crash, which happened to be with kernel 3.15.10 from the Ubuntu repo. That crash seemed to have been caused by dpm: [drm:si_dpm_set_power_state] *ERROR* si_set_sw_state failed The 3.15.10 version isn't part of the source, so I instead looked through the list of changes and found that the last set of changes made to drm, landed in kernel 3.16-rc6. So I installed the rc6 image and has now been running it for some time, but ran into yet another issue, which is unrelated to this bug. [ 6533.114483] alloc_contig_range test_pages_isolated(1bc800, 1bca8c) failed [ 6533.114492] alloc_contig_range test_pages_isolated(1bc800, 1bca8d) failed [ 6533.114500] alloc_contig_range test_pages_isolated(1bc800, 1bca8e) failed [ 6533.114506] alloc_contig_range test_pages_isolated(1bc800, 1bca8f) failed [ 6533.114511] alloc_contig_range test_pages_isolated(1bc800, 1bca90) failed [ 6533.114516] alloc_contig_range test_pages_isolated(1bc800, 1bca91) failed And so on. It pretty much causes frequent 2-5 second hangs, even while I'm writing this message. Just moving the cursor, causes such a hang. Changing workspace and the hang lasts 40 seconds. In other words, bisecting the dpm issue would be very difficult, since I would more than likely run into this issue as well. The last change made to drm/radeon/dpm were merged into 3.16-rc1, and it only affect si hardware. Suppose this issue could be moved to another bug entry, if it hasn't already been fixed.
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