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Re: Problems with kernel 4.17.0-1-amd64


An update on this:

Nicolas George (2018-07-25):
> The device for the audio controller takes about 0.3 seconds to open. I
> have just rebooted on 4.16, and with it the delay is imperceptible. (And
> yes, 0.3 seconds for that is a problem for me.) The audio device is
> listed as "ALC892 Analog".

This was documented in the ChangeLog (not in so many words), and the fix
is a module option:

options snd-hda-intel power_save=0

> More severe: from time to time, process doing disk access go into D
> state but the disk stays idle; the kernel reports nothing at all (in
> particular: no reset of the ATA bus). They can stay like that for a few
> seconds, a few dozens seconds, and I had a firefox freeze for several
> minutes until I got fed up and pressed the power button; the shutdown
> was clean. I had no such problem with 4.16.0-2-amd64, and I will be
> careful to see if they happen now that I have rebooted with the oldest
> kernel.

This one was fixed by adding this on the kernel command-line:

dm_mod.use_blk_mq=0 scsi_mod.use_blk_mq=0

It is possible that "ahci.mobile_lpm_policy=0" helps too, it was
suggested to me as a fix too and I have not yet tested without it, nor
with use_blk_mq in modprobe.d instead of the kernel command-line.


  Nicolas George

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