Comment 25 for bug 1874698

Hi Hui Wang. I'm on a -28 kernel. Did what you said to install the -26 v4 kernel. As usual, comment out "options snd-intel-dspcfg dsp_driver=1". Use my Hdmi.conf. When I rebooted with the -26 v4 kernel, I got stuck at a black screen again. But this time, I decided to try it a couple of times. It turns out that sometimes my -28 kernel also gets stuck at a black screen (quite rare. More often than not, it just boots up very quickly.). For the -26 v4 kernel, the black screen happens quite often. Luckily there was one instance where I could boot. I do not know how. Attaching dmesg log and alsa-info here for this lucky case.

Alsa-info: http://alsa-project.org/db/?f=eb81a042beed3bb62c86fa8e5e22f48319dc6596

When I run alsa-info, I see "cat: '/sys/module/snd_soc_skl_hda_dsp/parameters/*': No such file or directory". Not sure if this line was there before.