Hi, As an additional datapoint if this can help: On Wed, Jan 20, 2021 at 04:28:23PM -0600, Pierre-Louis Bossart wrote: > > > > > > Linux 5.10 fails to boot on my IceLake laptop, where 5.9 worked fine. > > > I'm not sure whether it's a bug in ACPI or Soundwire subsystem, so I'm > > > sending this to both > > > lists. The W taint flag is because of an unrelated nouveau failure (It > > > was busted on 5.9, and is > > > still on 5.10). Full kernel log down below. > > > It's from a distro kernel, but I can build my own kernel with patches if needed. > > > > Please try to add a check for handle against NULL to > > snd_intel_dsp_check_soundwire() after > > > > handle = ACPI_HANDLE(&pci->dev); > > > > and see if this makes any difference. > > > > This should check handle against NULL anyway, even if it didn't crash later on. > > Is there a way you can share the DSDT? > > The only thing we do in that sdw_intel_acpi_scan() function is check for an > _ADR and read two _DSD properties. I think it's been 2 years since we wrote > it and never had an issue, never say never I guess... > > If you want to bypass this problem for the time being, you can add a kernel > option in /etc/modprobe.d/alsa-base.conf > > options snd-intel-dspcfg dsp_driver=1 > > that will force the use of the HDaudio legacy driver and bypass the driver > autodetection. A user in Debian, Kubo Hiroshi reported what seems to be the same issue in https://bugs.debian.org/981003 . Regards, Salvatore
