radeonsi, southern islands random gpu lockups 3.15+, 3.16-rc*

[kernelOfTruth]

Ugh,

so no one actually has mentioned the random lockups that occur with 3.15 and 3.16* kernel series ...

well with 3.15.6 it occurs only for short moments and/or that X is crashing (so it's at least partly able to recover from it)

with 3.16-rc6 and latest drm-fixes it's now hardlocking pretty soon after starting up the system

card is a R9 270X

unfortunately I'm not in the position to troubleshoot/bisect since /home is on an ZFS partition and things take ages to set up - automation also is not possible & this box is needed for scientific research

so - hm, any ideas what to do ?

switch to windows meanwhile (not really an option since all data is on /home & it would be pretty hard to copy over stuff selectively and regularly rebooting) ?

replacing the card with something older ? is the radeon graphics stack even stable with 3.15 & 3.16-rc* right now ?

how's the experience with 3.14 kernels for you guys ?

[marek]

Yes, kernel 3.15 and 3.16-rc has been unstable with Sea Islands chips. I think it should be fixed with latest drm-fixes-3.16 from here: http://cgit.freedesktop.org/~agd5f/linux

If not, you can use kernel 3.14 which works fine.

[kernelOfTruth]

using the following http://cgit.freedesktop.org/~airlied...g/?h=drm-fixes - so I guess it was already the newest fixes, unfortunately seemed to trigger it even faster

Thanks marek, will try 3.14 based kernels then