> -----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. Alex > > Thanks, > > Joe > > [0] http://pad.lv/1386534 ��.n��������+%������w��{.n�����������ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f