linux-kernel - Re: video resume stuff

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Message-ID: <Pine.LNX.4.64.0710051648440.25413@twin.jikos.cz>
Date:	Fri, 5 Oct 2007 16:59:55 +0200 (CEST)
From:	Jiri Kosina <jikos@...os.cz>
To:	Pavel Machek <pavel@....cz>
cc:	"H. Peter Anvin" <hpa@...or.com>,
	kernel list <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: video resume stuff

On Fri, 5 Oct 2007, Pavel Machek wrote:

> > I suggest we tackle this *after* the x86 merge.
> Well, we still have the regression on jikos' strange system, and I would 
> like to understand what is going on there.

Sorry for this taking too long. Finally I had the time to play with this 
again, so here goes the current summary. I have a system here, that:

- with 1d67953f2bda8876045c24ae58841f27d9bb7572 (just before the setup 
  code rewrite), resumes nicely in VGA console 
  (acpi_sleep=s3_bios,s3_mode kernel parameter is needed), everything 
  works

- with c39736823232bc3ca113c8228fa852c09fba300e (just after the setup code 
  rewrite), VGA text console is garbled after resume - looks like the 
  video RAM contains some strange data (patterns from BIOS post can be 
  recognized, there are some various-colored stripes across the screen, 
  etc). The machine also seems to be frozen (no keyboard LEDs working, 
  etc).

- with 2.6.23-rc9, the video doesn't come up at all, I can't even see the 
  garbled picture any more - the display stays blank, the LED diod is 
  yellow (i.e. looks like completely no signal from VGA card). On the 
  other hand, the machine seems to work otherwise

-- 
Jiri Kosina
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