Re: ThinkPad - suspend-to-RAM intel-x86 issues and tests

[David Brownlee <abs%absd.org@localhost>]

Another couple of data points in case it helps

Tested on Thinkpad T420s and T530 with NetBSD/amd64 - both have
similar behaviour

8.99.25 Single user:
- Suspends and seems to resume but hangs on first disk access "wd0a:
device timeout reading fsbn ..."

netbsd-8 Single user:
- Suspend (hw.acpi.sleep.state=3) and resume appears to work reliably
many times in a row
- Booting multi user after suspend/resume: wireless iwn0 does not
appear to work "iwn0: could not load firmware .text section"

netbsd-8 Multi user no x11:
- Suspends, keyboard *usually* non responsive on resume (but can
switch virtual terminals)
On Wed, 21 Nov 2018 at 05:57, David H. Gutteridge <david%gutteridge.ca@localhost> wrote:
>
> On Tue, 2018-11-20 at 16:25 +0100, Riccardo Mottola wrote:
> > Hi David,
> >
> > David H. Gutteridge wrote:
> > > FWIW, I'm able to get suspend and resume to work reliably on a
> > > Lenovo
> > > T420 with NetBSD-8.0_STABLE. (With 8.99.x, it doesn't work as
> > > reliably
> > > because the SATA driver seems to have issues after resumption which
> > > don't occur with 8.0.) I didn't have to do anything of note to get
> > > it
> > > to work, it just does, assuming there's nothing extra attached.
> > > (Read
> > > on below.)
> >
> > The T420 is a lot newer and is amd64 instead of x86.
>
> True. What I can also say is that I tested the i386 port with it too
> (see kern/53658), and it worked too. I've also tested i386 with an LG
> X110 that I used to run NetBSD 5.x and then 7.x on. I could never get
> it to suspend. With 8.0, it doesn't resume successfully, because of an
> issue with the i915 DRM driver, but with the newer DRM code base that
> was pulled into HEAD, I've found 8.99.25 did successfully resume, so
> there may be hope.
>
> I have access to a Toshiba Satellite Pro that's a roughly similar
> vintage to your T43; I'll see how it behaves when I have a chance.
>
> > > On the other hand, I cannot get it to work on a Lenovo x131e (the
> > > AMD
> > > CPU version, with Radeon graphics). With that machine, it resumes,
> > > but
> > > the display stays dark. (This behaviour is consistent with most
> > > Linux
> > > kernels I've tried as well, so there's something tricky about it.)
> >
> > Yes, I have this issue on the T43 with ATI graphics, however it often
> > does work and come back (but takes several secons) it is unreliable,
> > but
> > the only ThinkPad I have NetBSD on which sometimes suspends/resumes
> > correctly.
> >
> > Did you try disabling video in configure and then trying to
> > suspend/resume after a clean boot?
>
> I haven't tried that yet, no. I'll add it to the list.
>
> > Christos suggested to me disabling video and audio (things in my
> > experience cause issue too).
> > I tried also fine-grained disabling based on dmesg devices.
> >
> > However, I went down to bare-bones, leaving just internal hard disk
> > and
> > keyboard - disabling everything which I could (but perhaps I missed
> > something) and yet it fails!
> >
> > > One other thing to consider is whether you have anything extra
> > > plugged
> > > into the USB stack when you're trying to suspend. I've found having
> > > pretty much anything plugged in (including a mouse) causes my T420
> > > to
> > > fail to completely suspend.
> >
> > Indeed, I did all the test with a just clean-booted machine with no
> > USB
> > mouse, keybord, dongles or else.
> >
> > It did not help.
>
> Hopefully, we'll figure this out.
>
> Dave
>
>