Re: Sleep mode in Surface Pro 4 and Debian 11

[nmanca <nmanca@sdf.org>]

On 07/10/2021 13:53, Andrew M.A. Cater wrote:
> On Thu, Oct 07, 2021 at 12:09:24PM +0200, nmanca wrote:
> > Dear list,
> >
> > I installed a debian 11 system on a Surface Pro 4 following the instruction
> > from the https://github.com/linux-surface/linux-surface, I'm now thus using
> > the "-surface" kernel version.
> >
> > Everything work quite ok, but I'm having problems with the suspend.
> >
> > If the Surface is on battery power, suspend works.
> > If it's on battery power, it does not wake up opening the cover or pressing
> > the power button. I have to force a hard shutdown by pressing the power
> > button.
> >
> > I don't know if the problem is "real" or maybe is just the screen that does
> > not recover. However, the diffrence between power plugged/unplugged is
> > strange and I don't know how to debug it. I inspected the dmesg, the only
> > difference is that when it is on battery, the last message after the failing
> > wake up is:
> >
> > PM: suspend entry (s2idle)
> >
> > This is absent if on battery, when the wake up works. the rest is the same,
> > apparently.
> >
> > Any idea?
> >
> > Thanks,
> > Nicola
>
> Hi Nicola,
>
> This is very new hardware: the github project is still under active development.
>
> Since you're using the -surface kernel, it's possibly we can't help.
>
> We'll help where we can but this is probably a kernel/hardware combination we
> don't have to hand.
>
> All the best,
>
> Andy Cater

Hi Andy,

don't worry, I just hope thay what I wrote could ring a bell in someone's head :D

In case, some help to debug the problem would be also greatly appreciated.

cheers,
Nicola