On Thu, 16 Nov 2017 06:53:37 +0100, VDR User wrote: > > Ok, after doing a git bisect on the kernel tree, I wound up with: > > 41eb94fd26f6c150b0460e01ecc84d643355f9b6 is the first bad commit > commit 41eb94fd26f6c150b0460e01ecc84d643355f9b6 > Author: Vinod Koul <vinod.koul@xxxxxxxxx> > Date: Fri Mar 4 20:25:30 2016 +0530 > > ALSA: compress: fix some typos > > So, something must have went wrong because that commit is just > spelling and grammar fixes in comments. Yeah, that's very unlikely. > How can I do a git bisect for just sound/ instead of the whole kernel? > I assume I'd have to clone the kernel, delete sound/, then clone the > alsa dev git sound/ in its place? It should be easier to git bisect in > alsa, then simply recompile modules, install, load, test, and repeat > until I find the offending commit right? What you can try is to bisect like git bisect start -- sound/hda sound/pci/hda git bisect good v4.5 git bisect bad v4.6-rc1 This will concentrate only on commits in sound/hda/* and sound/pci/hda/*. You have to be careful about the kernel version to be built eventually jumping back and forth, and remember which one is installed and rebooted/retested. I usually put a different suffix string to CONFIG_LOCALVERSION at each build or set CONFIG_LOCALVERSION_AUTO to put the git commit id. Takashi > On Wed, Nov 15, 2017 at 8:34 AM, VDR User <user.vdr@xxxxxxxxx> wrote: > >>> It just tried kernel 4.6-rc1 and the problem is present there as well. > >>> Is there a list of patches between stable kernel 4.5.7 and 4.6-rc1 > >>> somewhere? I can try to revert each of them one at a time if so. > >>> Unless someone has any better idea to narrow this down to the > >>> offending commit? > >> > >> There were a significant amount of changes between 4.5 and 4.6 > >> regarding HD-audio HDMI/DP due to DP-MST support and the movement of > >> chmap stuff into sound/hda. > >> > >> Both can be a culprit... > >> > >> For checking the former, could you try the following? > >> - Checkout 4.5.7 git branch > >> - merge (not cherry-pick) the commit 022f344b41a5 > >> % git merge 022f344b41a5 > >> > >> This will bring DP-MST changes on top of 4.5.7. > >> > >> Then build this and check whether it shows the problem. If yes, you > >> can easily bisect between 4.5.7 and here. If it doesn't show a > >> problem, the problem is in the rest changes in 4.6-rc1. > > > > Hi Takashi, > > > > I did: > > git clone https://github.com/torvalds/linux.git > > cd linux > > git checkout 022f344b41a5 > > > > After compiling, audio is working correctly with that commit: > > ~$ speaker-test -c 6 -t wav > > > > speaker-test 1.1.3 > > > > Playback device is default > > Stream parameters are 48000Hz, S16_LE, 6 channels > > WAV file(s) > > Rate set to 48000Hz (requested 48000Hz) > > Buffer size range from 64 to 5440 > > Period size range from 32 to 2720 > > Using max buffer size 5440 > > Periods = 4 > > was set period_size = 1088 > > was set buffer_size = 5440 > > 0 - Front Left > > 4 - Front Center > > 1 - Front Right > > 3 - Rear Right > > 2 - Rear Left > > 5 - LFE > > Time per period = 8.526391 > > > > Do you happen to known which commit I can try next that *should* have > > the problem so I can git bisect from there? > > > > Thanks! > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
