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From: Karol Babioch <karol@babioch.de>
To: Zhang Rui <rui.zhang@intel.com>
Cc: Mattia Dongili <malattia@linux.it>,
	platform-driver-x86@vger.kernel.org,
	ACPI Devel Mailing List <linux-acpi@vger.kernel.org>
Subject: Re: no brightness with acpi video since 3.3 [was Re: Issues with the sony-platform module]
Date: Tue, 19 Jun 2012 15:57:17 +0200	[thread overview]
Message-ID: <4FE0853D.7050503@babioch.de> (raw)
In-Reply-To: <1340067574.1682.5.camel@rui.sh.intel.com>

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Hi,

Am 19.06.2012 02:59, schrieb Zhang Rui:
> so ACPI video driver is used before 3.3 and it works?
> please try this patch
> https://bugzilla.kernel.org/attachment.cgi?id=73576
> and boot without acpi_backlight=vendor and see if it helps.
First of all: Unfortunately I still can't change the brightness. But I
couldn't reproduce a working solution with 3.3 and earlier (although it
definitely worked with 3.0/3.1 at some point in the past), so it
probably isn't your fault.

But the patch fixes another huge problem: It finally let's me boot a
3.4 kernel with KMS enabled. Beforehand I would get a black/blank
screen with kernels 3.4 and higher. This was some kind of a regression,
as I've experienced this kind of issue also with 2.6.38 and earlier. The
bug is filed here [1] and there are quite a few people affected by
it. So, thanks a lot for that!

Best regards,
Karol Babioch

[1] https://bugs.freedesktop.org/show_bug.cgi?id=50175


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      reply	other threads:[~2012-06-19 13:57 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-14 17:33 Issues with the sony-platform module Karol Babioch
2012-06-14 20:39 ` no brightness with acpi video since 3.3 [was Re: Issues with the sony-platform module] Mattia Dongili
2012-06-15  7:45   ` Karol Babioch
2012-06-15 11:36     ` Mattia Dongili
2012-06-15 12:08       ` Karol Babioch
2012-06-15 15:17       ` Karol Babioch
2012-06-15 22:37         ` Mattia Dongili
2012-06-15 23:13           ` Karol Babioch
2012-06-16  2:52             ` Mattia Dongili
2012-06-16 11:24               ` Karol Babioch
2012-06-16 13:07                 ` Mattia Dongili
2012-06-16 18:07                   ` Karol Babioch
2012-06-16 23:16                     ` Mattia Dongili
2012-06-17 10:50                       ` Karol Babioch
2012-06-18 22:19                         ` Mattia Dongili
2012-06-19 10:48                           ` Karol Babioch
2012-06-19  0:59   ` Zhang Rui
2012-06-19 13:57     ` Karol Babioch [this message]

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