linux-kernel - Re: i915 black screen introduced by ACPI changes

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Date:	Wed, 20 Feb 2013 12:01:04 -0800
From:	Chris Li <lkml@...isli.org>
To:	Daniel Vetter <daniel.vetter@...ll.ch>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	linux-kernel@...r.kernel.org, robert.moore@...el.com,
	feng.tang@...el.com, len.brown@...el.com
Subject: Re: i915 black screen introduced by ACPI changes

On Wed, Feb 20, 2013 at 11:45 AM, Chris Li <lkml@...isli.org> wrote:
> Here is the dmesg with "drm.debug=0xe". It is from the tip of git
> kernel. The computer has the black screen.
> Let me know what else do you need.

More probing. When I use type "reboot" via ssh. The machine will
able to exit the black screen  and show normal text based terminal
for the systemd shutdown message.

However, even if I switch the default run level to 3, without starting
X. The black screen still appear. I guess the black screen disappear
when kernel stop using virtual terminal.

I also verify that, in the good 3.6.x kernel. I am able to logout from
X and log back in without trigger black screen of death.

Chris
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