Created attachment 208641 [details] photo of trace drm-intel-nightly at 63461ba4 + all newer patches from torvalds (minus drm/sound to 8e0f93c (spi-fix)), thus at 8b13f98 of sound.git (/ALSA: dice: force to add two pcm devices for listed models) Getting a crash at every shutdown since the day before yesterday. Sometimes it's a panic log so long it instantly flushes the original cause from the screen (and not to disk), sometimes it's just as in the attached photo. While I thus do not know if there aren't other contributing factors (or crashers), I can say that reverting the last patch (actually I reverted the entire set of seven) that altered nvhdmi_chmap_cea_alloc_validate_get_type (so far) also gets rid of the final crash: ALSA: hda - Create common chmap object https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/?id=67b90cb84be8fde0e51f71834e15c32fbec08562 Two HDMI monitors attached to my Haswell 4770 (Z87 motherboard with a Creative CA0132 chip, USB mic, one empty DVI-I & another empty DP, and a Nvidia 970 with nothing connected to it for bumblebee). This does *not* occur on my Haswell 4200U (HM86, IGP only, eDP only/HDMI unconnected).
Thanks for the report. I pinged Intel guys who submitted the chmap patches.
Thanks for reporting. Working on to fix this.
Created attachment 208681 [details] Fix double fault in nvhdmi_chmap_cea_alloc_validate_get_type Found a bug in the nvhdmi_chmap_cea_alloc_validate_get_type function, when moving to chmap object. I have attached a patch which should fix that issue. Can you please validate once with this?
Looks like works. Thanks.
Fixed in the release.