[Bug 64859] [HSW ULT]Resume from S3 result in system reboot, with warm boot

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=64859

--- Comment #5 from cancan,feng <cancan.feng at intel.com> ---
(In reply to comment #4)
> (In reply to comment #2)
> > (In reply to comment #1)
> > > We seem to have a pile of "hsw ult only" bugs. Are those all on the same
> > > machine?
> > >
> > 
> > No, they don't seem to happen on the same machine. To this issue, it happens
> > on machine which info followed:
> > HSW ULT: C0 stepping 1 (id=0x0a26, rev 09),cpu MHz:1400 GT3（0x20) 1100MHz 
> > 
> > I also tested it on another hsw ult machine, but can't reproduce, which info
> > followed:
> > HSW ULT: B0 stepping (id=0x0a16, rev 03), CPU 0.80GHz, GT2（0x10) 600MHz; 
> > 
> 
> Could this be related with the BIOS version? What's the BIOS version of the
> machine that doesn't work?

Here is the current BIOS information:

BIOS Version  HSWLPTU1.86C.0114.R07.1303182216

I will upgrade the BIOS version to verify whether if this is related with BIOS
version.

> 
> 
> > > Paulo can you please confirm whether this is supposed to work on ult or not
> > > (I don't have a machine myself to test)?
> 
> The C stepping ULT machine I have here suspends and resumes fine (S3) on
> today's drm-intel-next-queued.

Did you warm boot the machine to test suspend and resume? Because this issue
only happens with warm boot a machine..
> 
> 
> > By the way, when I removed i915 and retested it, this issue still there.
> 
> Instead of "removing" i915, what happens if you completely blacklist i915
> (i.e., never load it)? If the problem still happens, then it's not the fault
> of the graphics driver.

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