linux-kernel - Re: [2/6] 2.6.21-rc2: known regressions

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Message-ID: <20070309233508.GB2197@elf.ucw.cz>
Date:	Sat, 10 Mar 2007 00:35:08 +0100
From:	Pavel Machek <pavel@...e.cz>
To:	Johannes Stezenbach <js@...uxtv.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	"Michael S. Tsirkin" <mst@...lanox.co.il>,
	Adrian Bunk <bunk@...sta.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	Jeff Chua <jeff.chua.linux@...il.com>, linux-pm@...ts.osdl.org,
	lenb@...nel.org, linux-acpi@...r.kernel.org, luming.yu@...el.com,
	Arkadiusz Miskiewicz <arekm@...en.pl>,
	Konstantin Karasyov <konstantin.a.karasyov@...el.com>,
	Greg KH <greg@...ah.com>,
	linux-usb-devel@...ts.sourceforge.net,
	Thomas Meyer <thomas.mey@....de>, Meelis Roos <mroos@...ux.ee>,
	Alexey Starikovskiy <alexey.y.starikovskiy@...ux.intel.com>,
	Janosch Machowinski <jmachowinski@....de>,
	vladimir.p.lebedev@...el.com,
	Ash Milsted <thatistosayiseenem@...ab.com>,
	dmitry.torokhov@...il.com, linux-input@...ey.karlin.mff.cuni.cz,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: [2/6] 2.6.21-rc2: known regressions

Hi!

> > You're better off using the VGA console, and lettign X re-initialize the 
> > graphics device. That generally at least has a reasonably good chance of 
> > working.
> > 
> > Re-initializing graphics modes really is very hard. You can try with the 
> > BIOS video hack (I forget the kernel command line to turn it on), but we 
> > really do end up depending on X doing it better.
> 
> acpi_sleep=s3_bios has always worked for me on my ThinkPad T42p.
> 
> Even if one doesn't use the fb console at all, radeonfb apparently
> is still required on some ThinkPad models to work around BIOS bugs:
> 
> http://www.thinkwiki.org/wiki/Problem_with_high_power_drain_in_ACPI_sleep#Radeon_GPU_not_powered_off


s2ram should be able to work around this, it has parts from
radeontool. (suspend.sf.net).


-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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