Date: Fri, 8 Dec 2006 16:30:33 +1100 (EST) From: Ian Smith <smithi@nimnet.asn.au> To: Nate Lawson <nate@root.org> Cc: freebsd-acpi@freebsd.org Subject: Re: screen dead after resume on Thinkpad X30 Message-ID: <Pine.BSF.3.96.1061208162342.14509B-100000@gaia.nimnet.asn.au> In-Reply-To: <4578E223.8060302@root.org>
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On Thu, 7 Dec 2006, Nate Lawson wrote:
> Ian Smith wrote:
> > On Thu, 7 Dec 2006, Lutz Boehne wrote:
> >
> > > I'm tracking RELENG_6 and after one upgrade, my Thinkpad X30 does not
> > > properly wake up out of standby anymore. After waking up, the laptop
> > > will still respond to key presses and I am able to reboot it by pressing
> > > Ctrl-Alt-Del, but nothing will appear on the screen until I see the BIOS
> > > POST.
> > >
> > > I spent some time to narrow down which changes in RELENG_6 seem to be
> > > responsible and found out that RELENG_6 from August 16th 2006 12:01am
> > > works fine and that RELENG_6 from 08:00pm that day does not.
> > >
> > > Candidate files are:
> > > src/sys/dev/acpica/acpi_video.c
> > > src/sys/i386/acpica/acpi_machdep.c
> > > src/sys/i386/acpica/acpi_wakecode.S
> > > src/sys/i386/acpica/acpi_wakeup.c
> > >
> > > I locally replaced those files in today's RELENG_6 with versions from
> > > before August 16th, built/installed kernel and world and resume works
> > > properly again.
> >
> > Not sure if it's your {,only} problem, but the default value for
> > hw.acpi.reset_video changed fairly recently, I think from 1 to 0, as I
> > had to set hw.acpi.reset_video=0 in /etc/sysctl.conf on a Thinkpad T23
> > on 6.1-RELEASE. You'll find recent references to this in the archives.
> >
> > Try hardwiring the value from your working version into sysctl.conf.
> >
> > FWIW, I also needed hw.syscons.sc_no_suspend_vtswitch=1 on the T23.
>
> Thanks for answering. The reason why the default is now 0 is that it
> caused some systems to spontaneously reset if it was 1. I did a quick
> check and it seemed that 1 causes more trouble overall than 0 so 0 is
> the default.
Fair enough too .. but since this is likely to catch a few more folks
unawares, do you think it may be worth a mention in /usr/src/UPDATING?
Cheers, Ian
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