On Wed, Aug 11, 2021 at 8:46 AM Iñaki Ucar <iucar@xxxxxxxxxxxxxxxxx> wrote:
>
> On Wed, 11 Aug 2021 at 15:12, Benjamin Berg <bberg@xxxxxxxxxx> wrote:
> >
> > Hi,
> >
> > is thermald.service active and running on that machine?
>
> thermald is not (and was never) installed.
>
> I'm pretty sure now it has something to do with some kernel change in
> the 5.13.x series. I have a (manual) test case that reproduces the
> issue reliably:
> - Suspend the laptop and wait a few minutes until it cools down.
> - Resume the session.
> - Launch a compilation task when the sensors' output shows a
> temperature of ~40ºC for the processor.
>
> I tested this for:
> - 5.13.{4,5,8} -> fan doesn't speed up quickly enough, the laptop shuts down.
> - 5.12.7 -> fan quickly reaches maximum speed, no shutdown.
>
> I see some differences for 5.12.x vs 5.13.x under
> /sys/class/thermal/thermal_zone*/*, but I'm not sure what I should
> look for. Or maybe the misconfiguration could be under
> /sys/class/thermal/cooling_device*/*? Other? Any hints would be
> appreciated.
Is the intel_tcc_cooling module loaded? If so, what happens if you
remove it? Also, have you opened a bz for this? I don't recall seeing
it, but I could be misremembering.
Thanks,
Justin
> Iñaki
>
> > If yes, could you please edit the command line of the systemd unit to
> > include --loglevel=debug and grab some logs[1]?
> >
> > Ideally both of a "bad" and "good" case.
> >
> > Obviously, we shouldn't be running into a critical temperature
> > situation where the laptop simply shuts down. But I am not sure whether
> > this is some misconfiguration or if thermald might be reacting too
> > slowly for some reason.
> >
> > A good next step is likely to raise the issue with the thermald
> > upstream and include the logs.
> >
> > Benjamin
> >
> > [1] You can also stop the service and simply run thermald manually as
> > root. Maybe you find that more convenient. i.e. something like:
> > thermald --no-daemon --loglevel=debug --adaptive
> >
> > On Wed, 2021-08-11 at 12:31 +0200, Iñaki Ucar wrote:
> > > Hi,
> > >
> > > This is so annoying. Recently, I've been experimenting
> > > software-initiated shutdowns in my laptop (LG Gram) due to sudden
> > > temperature rises in which the fan doesn't catch up and doesn't reach
> > > maximum speed. In the journal, I see:
> > >
> > > kernel: thermal thermal_zone0: acpitz: critical temperature reached,
> > > shutting down
> > >
> > > They happen as follows. When the laptop is still cool (e.g., recently
> > > powered up), if I launch some compilation task, which is quite CPU
> > > demanding, then the temperature rises quickly and I hear that the CPU
> > > fan speeds up too slowly, so slowly that the critical temperature is
> > > reached and the laptop shuts down. However, if the laptop was already
> > > medium-hot due to other tasks, then the CPU fan catches up and reaches
> > > maximum speed quickly, so the temperature is controlled.
> > >
> > > This wasn't happening before, and I'm guessing that maybe some default
> > > kernel thermal parameters have changed recently? (This is replicable at
> > > least with all the kernels currently installed: 5.13.4, 5.13.5,
> > > 5.13.8). I see that the thermal policy is step_wise in some thermal
> > > zones, and user_space in others (there are 8). I'll be happy to provide
> > > more info if anyone has any clue on how to debug and/or fix this.
> > >
> > > Regards,
> > > --
> > > Iñaki Úcar
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>
>
> --
> Iñaki Úcar
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