Semi-working patch for amd64 suspend/resume
mav at FreeBSD.org
Mon Dec 1 09:19:36 PST 2008
Ian Smith wrote:
> On Mon, 1 Dec 2008, Alexander Motin wrote:
> > Alexander Motin wrote:
> > > As result, I have found, that if I am inserting:
> > > qqq:
> > > jmp qqq
> > > lines before line 98 of acpi_switch.S:
> > > movl $MSR_MTRRdefType, %ecx
> > > movl WAKEUP_CTX(mtrr), %eax
> > > wrmsr
> > > system hangs, but if I insert it just after them - system reboots.
> > >
> > > With just commenting this three lines I was able to get successful
> > > suspend/resume with UP amd64 kernel!!!
> > >
> > > Here is problems I still have now:
> > > - SMP kernel resume is not working, system reboots while doing
> > > acpi_wakeup_cpus();
> > > - SATA controller does not resumes correctly, it dies for some reason,
> > > reporting timeouts on any request;
> > This one is not a problem anymore. Seems to be fixed.
> > > - text mode video does not restores on resume, while Xorg graphic one
> > > does. hw.acpi.reset_video=1 does not help, it just hanging resume process.
> Longshot: hw.syscons.sc_no_suspend_vtswitch=1 fixes similar symptoms on
> two (older, i386 and UP) laptops here. Some folks have reported needing
> to have VESA loaded to get text mode video back up. Maybe worth a try?
vtswitch does not help and vesa generally does not working under amd64.
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