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Date: Fri, 15 Mar 2013 02:06:02 -0700
Message-ID: <CANeU7Qmk8JqCZzMh2Vdmydpm=9Bxi+x=HmRbXxX4CTz1H_PX=g@mail.gmail.com>
Subject: Re: [Intel-gfx] i915 black screen introduced by ACPI changes
From: Chris Li <lkml@chrisli.org>
To: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>, len.brown@intel.com,
        feng.tang@intel.com, intel-gfx <intel-gfx@lists.freedesktop.org>,
        linux-kernel@vger.kernel.org, robert.moore@intel.com,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Zhang Rui <rui.zhang@intel.com>
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On Fri, Mar 15, 2013 at 12:29 AM, Jani Nikula
<jani.nikula@linux.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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