Bug#943515: [External] Bug#943515: linux-image-5.2.0-3-amd64: Cannot resume from suspend

[Mark Pearson <mpearson@lenovo.com>]

> On Sat, Oct 26, 2019 at 7:28 PM Ben Hutchings <ben@decadent.org.uk>
> wrote:
> > I have the same model and can't reproduce this.
> >
> > Does this still happen if you remove the acpi_call module?
> 
> Yes, I removed acpi_call module and can't resume from suspend.
> 
> I also done clean testing installation, with only main packages and standard
> system utilities, no configuration at all.
> Just boot and sudo systemctl suspend, and can't resume.
> 
> --
> Cheers,
> Anton

Hi Anton,

We tried here at Lenovo (using the same 5.2.17 testing stream) and weren't able to reproduce either I'm afraid. Let me know if you are able to narrow it down to something in particular. 

We recently debugged a suspend-and-resume issue on the P1 Gen2 using hybrid graphics mode and in that case it was a link training issue in the i915 driver caused by a timeout being too short. It only happened on a system with an OLED screen and was 'introduced' 4.19.3 as that was when eDP link re-training was enabled (it is a timeout setting in the BIOS that is the problem, not the kernel code itself, but the code change triggered the issue). In that particular case on resume everything was working fine except the screen was blank (so you could ssh in to the system succesfully). We've only seen that issue on P1G2 so it's really unlikely it's the same thing your seeing - but just in case it's helpful.

Thanks
Mark