linux-kernel - Re: [Regression: 2.6.25-rc5: Blank Screen: Intel 945]

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Message-ID: <47F13A74.8010206@gawab.com>
Date:	Mon, 31 Mar 2008 12:24:36 -0700
From:	Justin Madru <jdm64@...ab.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
CC:	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [Regression: 2.6.25-rc5: Blank Screen: Intel 945]

Jesse Barnes wrote:
> So somehow both pipes are getting disabled, and your LCD is getting turned
> off and things never get re-enabled.  The X driver should have turned things
> back on though, after detecting what's available.  Do you have your X logs
> from the working & broken cases?  Also, did you try reproducing the blank
> screen problem w/o gdm enabled as Bryce suggested?  That could help narrow
> down if it's just an intelfb problem vs. a new intelfb/X driver interaction
> bug.

Well, I disabled gdm and tryed to trigger the blank screen. I did about ~16 reboots and it blanked out on me only 2 times.
I was using a script to reboot and/or startx. One time I'm not exactly sure if X was started, so it might have blanked out on a "startx".
The other time I'm fairly sure X wasn't started, so it blanked out on a terminal login.

Both of the blank outs were different than the ones with gdm started. Pressing ctrl+alt+f# changed nothing on the screen;
the screen seemed almost completely off (no or little backlight). A few seconds after pressing the power button the shutdown splash screen would show, but this time it was _very_ faint.

Usually, when gdm is enabled, pressing ctrl+alt+f# would "refresh" (or mode/resolution change) the screen, but it would still be blank.
Also the backlight still seamed to be on and at full brightness (although, still displaying black).

Well, I don't know what to say, it's the strangest of problems.

Justin

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