Hi Lukas, Ran this patch through the farm, and it seems that this patch might've helped HSW, maybe even BSW. ILK, IVB and SNB are still hanging hard to the same igt-test, kms_pipe_crc_basic@suspend-read-crc-pipe-? I'll try to make a kernel with the changes you proposed, but as I'm not familiar with the driver innards, it might take a while. Tomi On Thursday 31 March 2016 22:35:17 Lukas Wunner wrote: > Hi Tomi, > > On Thu, Mar 31, 2016 at 10:21:16AM +0300, Tomi Sarvela wrote: > > The problem with the results in your link is that there is no HSW, ILK, > > IVB > > or SNB results. This might give the impression that everything is well. > > > > Most damning is lack of HSW-gt2 and SNB-dellxps: those machines hang on to > > APC, and have run quite stably for every Patchwork run. The case isn't > > strong enough yet that series should fail if either of those won't run, > > but it might be so in future. > > So my patch seeking to fix the hangs has passed Romania CI with "success": > https://patchwork.freedesktop.org/series/5125/ > > However I don't see HSW-gt2 and SNB-dellxps in their hardware lineup. > And I would still like to know what the actual cause of the hangs is > since they do not occur on my IVB laptop. > > If you get the chance maybe you can repeat the test and include a > "dump_stack();" at the beginning of intel_fbdev_output_poll_changed() > and intel_fbdev_restore_mode(). This should show in the logs which of > the two functions is called during suspend/resume and from where it's > called. My guess is that this particular hardware causes a hotplug > signal to be generated upon waking up. If the hangs do not stop with > this patch, booting with "no_console_suspend" should at least show > what's going on. > > Thank you & best regards, > > Lukas _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
