From: bugzilla-daemon@bugzilla.kernel.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 115011] [drm:radeon_acpi_init [radeon]] *ERROR* Cannot find a backlight controller
Date: Thu, 14 Jul 2016 10:30:23 +0000 [thread overview]
Message-ID: <bug-115011-2300-SiOfF7Ymlh@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-115011-2300@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=115011
Hans de Goede <jwrdegoede@fedoraproject.org> changed:
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CC| |jwrdegoede@fedoraproject.or
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--- Comment #12 from Hans de Goede <jwrdegoede@fedoraproject.org> ---
Hi Alex,
(In reply to Alex Deucher from comment #10)
> (In reply to Luya Tshimbalanga from comment #7)
> > Created attachment 210281 [details]
> > dmesg with 4.6.0-0.rc0.git13.1
> >
> > dmesg report using latest git kernel i.e. 4.6.0-0. Same result:
> >
> > [ 7.498283] [drm:radeon_acpi_init [radeon]] *ERROR* Cannot find a
> > backlight controller
>
> This message is harmless. Your laptop has two GPUs. The ATIF ACPI method
> is used to notify the driver of backlight change events so the driver checks
> to see if it exists. Depending on the board configuration, the secondary
> GPU may or may not have access to the backlight controller. In this case it
> does not.
Mayebe we need to make the error a bit less scary then, e.g. :
[drm:radeon_acpi_init [radeon]] *Warning* Cannot find a backlight controller,
this is ussualy harmless on dual gpu systems
Yes it is a bit long, but it will likely help to avoid future bug reports about
this.
Regards,
Hans
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next prev parent reply other threads:[~2016-07-14 10:30 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-115011-2300@https.bugzilla.kernel.org/>
2016-03-28 23:32 ` [Bug 115011] [drm:radeon_acpi_init [radeon]] *ERROR* Cannot find a backlight controller bugzilla-daemon
2016-03-29 14:16 ` bugzilla-daemon
2016-03-29 17:30 ` bugzilla-daemon
2016-07-14 10:30 ` bugzilla-daemon [this message]
2016-09-13 5:08 ` bugzilla-daemon
2016-09-13 5:13 ` bugzilla-daemon
2016-09-13 5:16 ` bugzilla-daemon
2016-09-13 5:21 ` bugzilla-daemon
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