On 01/08/2015 05:00 PM, Deucher, Alexander wrote: >> -----Original Message----- >> From: Joseph Salisbury [mailto:joseph.salisbury@xxxxxxxxxxxxx] >> Sent: Thursday, January 08, 2015 4:58 PM >> To: Deucher, Alexander >> Cc: stable@xxxxxxxxxxxxxxx; LKML; Koenig, Christian; David Airlie; dri-devel >> Subject: Re: [Regression][v3.17][3.18][3.19-rc3] drm/radeon: re-enable dpm >> by default on BTC >> >> On 01/08/2015 12:48 PM, Deucher, Alexander wrote: >>>> -----Original Message----- >>>> From: Joseph Salisbury [mailto:joseph.salisbury@xxxxxxxxxxxxx] >>>> Sent: Thursday, January 08, 2015 11:26 AM >>>> To: Deucher, Alexander >>>> Cc: stable@xxxxxxxxxxxxxxx; LKML; Koenig, Christian; David Airlie; dri-devel >>>> Subject: Re: [Regression][v3.17][3.18][3.19-rc3] drm/radeon: re-enable >> dpm >>>> by default on BTC >>>> >>>> On 01/07/2015 09:51 PM, Deucher, Alexander wrote: >>>>>> -----Original Message----- >>>>>> From: Joseph Salisbury [mailto:joseph.salisbury@xxxxxxxxxxxxx] >>>>>> Sent: Wednesday, January 07, 2015 5:51 PM >>>>>> To: Deucher, Alexander >>>>>> Cc: stable@xxxxxxxxxxxxxxx; LKML; Koenig, Christian; David Airlie; dri- >> devel >>>>>> Subject: [Regression][v3.17][3.18][3.19-rc3] drm/radeon: re-enable >> dpm >>>> by >>>>>> default on BTC >>>>>> >>>>>> Hi Alexander, >>>>>> >>>>>> A kernel bug report was opened against Ubuntu [0]. After a kernel >>>>>> bisect, it was found that reverting the following commit resolved this >> bug: >>>>>> commit c08abf11900e19b14dd3a0cc3d105bd74519cd18 >>>>>> Author: Alex Deucher <alexander.deucher@xxxxxxx> >>>>>> Date: Mon Jul 14 12:01:40 2014 -0400 >>>>>> >>>>>> drm/radeon: re-enable dpm by default on BTC >>>>>> >>>>>> The regression was introduced as of v3.17-rc1 and still exists in >>>>>> current mainline. It has also made it's way into the stable releases. >>>>>> >>>>>> I was hoping to get your feedback, since you are the patch author. Do >>>>>> you think gathering any additional data will help diagnose this issue, >>>>>> or would it be best to submit a revert request? >>>>>> >>>>> Does revering b2dccf24e77 help? I'd hate to revert this patch because it >>>> disables power management for a whole family of chips. If it doesn't help >> I'd >>>> prefer to just add a quirk to disable it for the specific problematic board. >>>> Commit b2dccf24e77 was added to mainline as of v3.18-rc1 and was not >>>> cc'd to stable. We are also seeing this issue in the 3.13.y stable >>>> kernel, which does not have commit b2dccf24e77 applied. However, we >> can >>>> test reverting it in mainline? >>> Nope. Won't make a difference. The attached patch adds a quirk list for >> dpm which will fix the issue for the affected boards. >>> Alex >> Thanks again for the patch, Alex. The bug reporter has tested a 3.16 >> kernel with the patch and says it fixes the bug. > I'll queue it up for 3.19-fixes and cc stable. Great. Thanks, again! > Thanks, > > Alex > >> >>>>> Alex >>>>> >>>>>> Thanks, >>>>>> >>>>>> Joe >>>>>> >>>>>> [0] http://pad.lv/1386534 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
