suspend/resume regression

[Edward Tomasz Napierała]

On 0513T1244, Pete Wright wrote:
> 
> 
> On 05/13/2018 10:27, Pete Wright wrote:
> >
> >
> > On 05/13/2018 08:58, Theron wrote:
> >>> Hi!
> >>> I'm also seeing issues, not as severe as Pete, but after I resume 
> >>> (which works, with drm-next and DMC firmware), the system becomes 
> >>> sluggish.  It feels like I/O takes more time, and graphics are 
> >>> sluggish (very sientific, I know, but for instance git operations 
> >>> are much slower after a resume).  I know there's been an update to 
> >>> acpica between my system updates, when this started to happen, but I 
> >>> haven't had time to revert that update and test again.  I will try 
> >>> to do that and report back.
> >>> Regards
> >> Hi Niclas,
> >> I used drm-next on Skylake with issues which sound similar. Resuming 
> >> from suspend, or simply switching the laptop display output off and 
> >> on from xrandr, resulted in graphics sluggishness (drop to 30fps in 
> >> glxgears) and graphical corruption in Xorg apps, which persisted even 
> >> after restarting these apps. Switching to drm-stable made the 
> >> problems go away; I haven't had time to figure out what -next is 
> >> doing differently to cause them.
> >>
> >> Pete's issue sounds more severe, and unrelated as it happens without 
> >> drm loaded.  My kernel is two weeks out of date (r333093), so I need 
> >> to check whether the more recent changes affect my system as well.
> >>
> > so i've done a bit more debugging on my end.  i've even installed the 
> > 11.2-BETA branch last night since 11-STABLE worked without issues 
> > about a month or so ago.
> >
> > i've set "debug.acpi.resume_beep=1" and when resuming after entering 
> > an S3 sleep state the bell rings and does not stop until i do a hard 
> > reset (both with i915kms loaded and unloaded).
> >
> > kinda at a loss as to how this could break both CURRENT and basically 
> > 11-STABLE.  i'm going to make a ubuntu live image and test that, my 
> > laptop is a System76 laptop that shipped with ubuntu originally.  if 
> > that is broken as well then i guess this could be a hardware issue.
> >
> ubuntu live image suspends/resumes without issue so this certainly seems 
> to be a freebsd issue unfortunately.  i guess next step is to attempt to 
> find a working CURRENT snapshot that does suspend/resume without issue 
> then start looking at commits?

FWIW, I'm seeing the same - sluggishness after resume - with stock
12-CURRENT, without drm-next, just vanilla i915kms.ko, on T420.

TBH I'm not entirely sure it's X11 problem - as I'm writing it now,
under vt(4), it seems somewhat slow too.