[haiku-bugs] Re: [Haiku] #2675: Backlight turned off on Radeon Mobility X600
- From: "mmlr" <trac@xxxxxxxxxxxx>
- Date: Tue, 14 Jun 2011 15:30:07 -0000
#2675: Backlight turned off on Radeon Mobility X600
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Reporter: leavengood | Owner: euan
Type: bug | Status: in-progress
Priority: normal | Milestone: R1
Component: Drivers/Graphics/radeon | Version: R1/pre-alpha1
Resolution: | Keywords:
Blocked By: | Blocking: 7662
Has a Patch: 0 | Platform: All
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Comment (by mmlr):
Replying to [comment:8 leavengood]:
> I do know that using the function key and brightness buttons doesn't
help. I was hoping that Haiku might at least handle those buttons and
maybe could turn on the backlight with ACPI, but I guess not. I may look a
bit at the backlight code in ACPI, but maybe looking over the Xorg sources
is the way to go. If anyone reading on the bugs list (mmlr?) has an idea,
please chime in.
If the backlight works in VESA but doesn't when the ATI driver is in use
then it's most probably not ACPI who's doing the backlight configuration.
Of course it's possible, but it'd seem strange to me that it'd behave
differently depending on the driver since as far as I've read the relevant
ACPI spec parts I'd have guessed that the ACPI backlight stuff is pretty
much device/driver independent.
So looking at the suggested scratch registers in RADEONInitBIOSRegisters()
would seem more promising to me.
--
Ticket URL: <http://dev.haiku-os.org/ticket/2675#comment:9>
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