Re: Suspend-resume failure on Intel Eagle Lake Core2Duo

[Martin Peres]

On 27/07/17 10:36, Tomi Sarvela wrote:
> On 26/07/17 17:26, Thomas Gleixner wrote:
> > On Wed, 26 Jul 2017, Martin Peres wrote:
> > > On 25/07/17 10:01, Tomi Sarvela wrote:
> > > > On 24/07/17 19:37, Martin Peres wrote:
> > > > > On 24/07/17 19:35, Thomas Gleixner wrote:
> > > > > > On Mon, 24 Jul 2017, Martin Peres wrote:
> > > > > > > On 24/07/17 18:28, Thomas Gleixner wrote:
> > > > > > > > Output of 'cat /proc/interrupts' and a description what kind of
> > > > > > > > 'old' Intel
> > > > > > > > platform that is.
> > > > > > >
> > > > > > > Sorry, I should have repeated the name outside of just the 
> > > > > > > subject of
> > > > > > > the
> > > > > > > email. It is an Intel Eagle Lake Core2Duo.
> > > > > >
> > > > > > I hoped you would give me a little bit more details, but I Gurgled it
> > > > > > now. I try to find such a beast and look what's wrong there. If I 
> > > > > > can't
> > > > > > find one, I'll come back with some debug patches.
> > > > >
> > > > > Ha, sorry!
> > > > >
> > > > > Here is all the info I have:
> > > > >    - Hardware: HP Compaq 8000
> > > > >    - CPU: Eagle Lake Core2Duo E7500
> > > >
> > > > As mentioned, it's HP Compaq 8000 Elite, desktop tower in most basic
> > > > configuration: one SATA SSD, 4GB memory and so on. Most recent BIOS 
> > > > from
> > > > around 2012, no UEFI.
> > > >
> > > > If you have proposed fix for the issue, I'll be happy to test them.
> > > >
> > > > Best regards,
> > >
> > > Thanks for the information Tomi.
> > >
> > > Thomas, any update on this? Another user reported the problem:
> >
> > Not yet.
> >
> > > "I have the same thing on an old cheap laptop.
> > > model name      : Intel(R) Core(TM)2 CPU
> > > cpu family      : 6
> > > model           : 15
> > >
> > > Previously, this never happened on the kernel series 4.{10,11,12}.
> > > After reverted commit bf22ff45bed664 on 4.13-rc2, unfortunately it 
> > > still hangs
> > > when it wakes up.
> >
> > So reverting that commit does not help. Does it help on your machine?
>
> Yes. Reverting it does not cause the machine to lock up on resume.
>
> I haven't tested if the machine locks up later on, but at least it 
> survives couple of s/r cycles

FYI, the user who reported reverting the patch was not sufficient 
actually now says he was hit by a second bug which he found.

So, a revert is always possible.

Cheers,
Martin