Created attachment 33072 [details] dmesg with 2.6.36-rc7 I'm experiencing a hard lock (i.e., no magic SysRq) after playing Penumbra Overture for about a minute on my ThinkPad t43p with kernel 2.6.35 / 2.6.36-rc3. I'm using KMS. 2.6.34 works fine. I didn't test thoroughly with 2.6.35. With 2.6.36-rc3, I did not mess with any of the new power savings settings. I'm not using any xorg.conf, I'm using KMS. Without KMS the problem does not occur. 2.6.34 is the last kernel that worked with KMS. Some more info: lspci says: ATI Technologies Inc M24GL [Mobility FireGL V3200] (rev 80) System info: Slackware 13.1, Mesa 7.8.1, Xserver 1.7.7. I did try other versions of mesa (including Gallium3D), but that did not make a difference. Furthermore, I tried to bisect this problem, but ended up within the range of 2.6.34-rc's, so I don't think that provided any help in this case. I also wrote to dri-devel about this problem, but received no reply. I then went to the radeon IRC-channel, where I was told that these complete hangs are very hard to debug, but that it would help to have a Bugzilla report. I wasn't sure whether or not to report this as a regression, so I chose not to. Please correct me if I'm wrong! I've attached some info that I hope might help, i.e. dmesg, Xorg.log and kernel config for both kernel 2.6.34.7 (working) and 2.6.36-rc7 (not working). In closing--I'd really like this problem to be solved, and I'd very much like to help out as much as I can. Regards, PJ
Created attachment 33082 [details] dmesg with 2.6.34.7
Created attachment 33092 [details] kernel config 2.6.36-rc7
Created attachment 33102 [details] kernel config 2.6.34.7
Created attachment 33112 [details] Xorg.log with kernel 2.6.36-rc7
Created attachment 33122 [details] Xorg.log with kernel 2.6.34.7
It could be this bug: https://bugs.freedesktop.org/show_bug.cgi?id=29389 The last 2.6.36 RCs should already have the 'poll' parameter.
I'll test with the poll parameter tonight. Thanks for notifying me!
Tested with drm_kms_helper.poll=0 and the problem is gone, thanks! I tried to mark this report a duplicate, then I noticed the other is for freedesktop, not for the kernel. I'll leave this report open as well, as a record. Also; is there anything else I can do to help solve this bug? I'd like to help out, even though I cannot code.
I tried running Penumbra Overture with 2.6.37-rc1 and the problem appears to be gone! I'm very happy. Is there any chance that the associated patch might also be added to the stable branches of 2.6.35 and 2.6.36?