[Bugme-new] [Bug 21212] New: ATI Radeon HD 5850 low brightness when acpi enabled
bugzilla-daemon at bugzilla.kernel.org
bugzilla-daemon at bugzilla.kernel.org
Tue Oct 26 14:36:58 PDT 2010
https://bugzilla.kernel.org/show_bug.cgi?id=21212
Summary: ATI Radeon HD 5850 low brightness when acpi enabled
Product: ACPI
Version: 2.5
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Video
AssignedTo: acpi_power-video at kernel-bugs.osdl.org
ReportedBy: lixo1 at hotmail.fr
Regression: No
On my HP Envy 17, with ATI Radeon HD 5850, using kernels >= 2.6.34, every boot
time the screen brightness goes to 0 when the acpi is enabled.
The only way to fix it is setting acpi=off.
After many tests, this bug seems to me not dependent of any kind of graphics
modules activated on the kernel, in fact it appears always.
This bug affects also all distribution kernels, like Ubuntu, Fedora, Gentoo,
etc..
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