Re: Fwd: Brightness on HP EliteBook 8460p

["Pali Rohár" <pali.rohar@gmail.com>]

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On Friday 20 January 2012 17:55:57 Pali Rohár wrote:
> On Friday 20 January 2012 11:28:59 joeyli wrote:
> > 於 五，2012-01-20 於 11:12 +0800，joeyli 提到：
> > 
> > > Hi Pali,
> > > 
> > > Sorry for I am late reply you.
> > > 
> > > 於 二，2012-01-17 於 19:10 +0100，Pali Rohár 提到：
> > > 
> > > > On Wednesday 21 December 2011 12:45:07 Pali Rohár wrote:
> > > > > Hello,
> > > > > 
> > > > > I tried to boot with all 3 strings in acpi_os_name, but nothing was
> > > > > changed. I'm attaching dmesg outputs, one from BIOS mode, one from
> > > > > UEFI mode. Both are with "Microsoft Windows NT".
> > > > 
> > > > Did you looked at my logs?
> > > 
> > > I checked your dmesg log, found the acpi_os_name kernel parameter is :
> > > 
> > > [    0.000000] Command line: BOOT_IMAGE=/vmlinuz-3.2.0-4-generic
> > > root=UUID=4ec6272a-8551-40f3-a1b1-3e10984f3e69 ro pcie_aspm=force
> > > acpi.debug_level=0x2 acpi.debug_layer=0xFFFFFFFF "acpi_os_name=Microsoft
> > > Windows NT" splash vt.handoff=7
> > > 
> > > We still need by-pass the os name check in DSDT when test function key,
> > > 
> > > please help to feed:
> > > 	acpi_os_name="Windows 2009"
> > > 
> > > And,
> > > looks like the acpi debug level not enough, please kindly change acpi
> > > 
> > > debug parameter to:
> > > 	acpi.debug_level=0xF acpi.debug_layer=0xFFFFFFFF log_buf_len=5M
> > > 
> > > summary:
> > > 	acpi.debug_level=0xF acpi.debug_layer=0xFFFFFFFF log_buf_len=5M
> > > 	acpi_os_name="Windows 2009"
> > 
> > Forgot remind,
> > please remember press brightness function key a couple of times before
> > you dump the dmesg and messages log.
> > 
> > 
> > Thanks a lot!
> > Joey Lee
> 
> Hello,
> 
> there was no acpi log, so I recompiled ubuntu kernel with
> CONFIG_ACPI_DEBUG=y and CONFIG_ACPI_DEBUG_FUNC_TRACE. Then I started kernel
> with your params.
> 
> Now I'm attaching very long debug output. I belive it will be now usefull.
> 
> Pressing brightness keys did not show anything in log.
> 
> After writing 0 to /sys/class/backlight/acpi_video0/brightness in log
> appear: [   57.675070] [ACPI Debug]  Integer 0x000000000000000B
> ...
> 
> And after writing 10:
> [   99.865208] [ACPI Debug]  Integer 0x0000000000000048
> [   99.865295]   evmisc-0120 [4294967289] ev_queue_notify_reques:
> Dispatching Notify on [DGFX] Node ffff880136246c80 Value 0xD0 (**Device
> Specific**) [   99.865350]    video-1474 [4294967289] video_bus_notify     
> : Unsupported event [0xd0]

Do you need more logs? Or is this enought?

-- 
Pali Rohár
pali.rohar@gmail.com

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