linux-kernel - Re: [Intel-gfx] i915 black screen introduced by ACPI changes

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Date:	Fri, 15 Mar 2013 02:06:02 -0700
From:	Chris Li <lkml@...isli.org>
To:	Jani Nikula <jani.nikula@...ux.intel.com>
Cc:	Daniel Vetter <daniel.vetter@...ll.ch>, len.brown@...el.com,
	feng.tang@...el.com, intel-gfx <intel-gfx@...ts.freedesktop.org>,
	linux-kernel@...r.kernel.org, robert.moore@...el.com,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Zhang Rui <rui.zhang@...el.com>
Subject: Re: [Intel-gfx] i915 black screen introduced by ACPI changes

On Fri, Mar 15, 2013 at 12:29 AM, Jani Nikula
<jani.nikula@...ux.intel.com> wrote:
> I've never used the acpi_osi= kernel parameter, but it looks like you
> could workaround this with acpi_osi="!Windows 2012". Please check that
> running the "bad" kernel.

That did not work for me. Still have black screen on the tip of git.
I did that to the gurb2-efi.cfg
Here is my kernel cmdline:

$ cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-3.9.0-rc2+
root=UUID=75d90f06-bcdc-40c0-a3a3-7edf9af38d41 ro rd.md=0 rd.lvm=0
rd.dm=0 rd.luks=0 vconsole.keymap=us LANG=en_US.UTF-8 drm.debug=0xe
"acpi_osi=!Windows\x202012"

Chris
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