* [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook 8560w)
@ 2011-11-23 20:34 Artur Flinta
[not found] ` <CAGB3EUR750VpHdvrZ25mn9bcS-4ZT+BSJ_zD4-sRncyYNT=0Zg@mail.gmail.com>
0 siblings, 1 reply; 14+ messages in thread
From: Artur Flinta @ 2011-11-23 20:34 UTC (permalink / raw)
To: linux-acpi
Hi!
I have HP Elitebook 8560w with FirePro M5950, Fedora 16, kernel
3.1.1,xorg ati driver 6.14.3 and issues with screen backlight - can't
dimit.I can write to /sys/class/backlight/acpi_video0/brightness
valuesfrom 0 to 20 (as stated in max_brightness), but it have no
effect onthe screen, values in brightness as well as in
actual_brightnessreflects written number.Before system boot, I can
change brightness of the screen, and itpersist in operating system.
Value of the/sys/class/backlight/acpi_video0/brightness indicates
maximumbrightness (20) even if minimal was set before boot. Kernel
radeon driver maintainers said, that backlight is driven by APCI
drivers, so I'm here to ask for help :)
How can I help to debug this issue? I'm able to recompile kernel and
apply patches, as well as do some tests. Unfortunately I'm unable to
write or correct driver code.
RegardsArtur
--
Każdy problem ma swoje rozwiązanie, zatem
jeżeli nie ma rozwiązania to nie ma problemu.
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fwd: [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook 8560w)
[not found] ` <CAGB3EUR750VpHdvrZ25mn9bcS-4ZT+BSJ_zD4-sRncyYNT=0Zg@mail.gmail.com>
@ 2011-12-09 14:54 ` joeyli
[not found] ` <CAEPe-G+iooX_BOD=5m1nMgn+t63XGsLR+4JCfvHKOyTx98qydg@mail.gmail.com>
0 siblings, 1 reply; 14+ messages in thread
From: joeyli @ 2011-12-09 14:54 UTC (permalink / raw)
To: aflinta; +Cc: linux-acpi, platform-driver-x86
Hi Artur,
於 五,2011-12-09 於 22:41 +0800,Li Joey 提到:
>
>
> ---------- Forwarded message ----------
> From: Artur Flinta <aflinta@gmail.com>
> Date: 2011/11/24
> Subject: [Bugreport] Screen backllight issues on FirePro M5950 (HP
> EliteBook 8560w)
> To: linux-acpi@vger.kernel.org
>
>
> Hi!
> I have HP Elitebook 8560w with FirePro M5950, Fedora 16, kernel
> 3.1.1,xorg ati driver 6.14.3 and issues with screen backlight - can't
> dimit.I can write to /sys/class/backlight/acpi_video0/brightness
> valuesfrom 0 to 20 (as stated in max_brightness), but it have no
> effect onthe screen, values in brightness as well as in
> actual_brightnessreflects written number.Before system boot, I can
> change brightness of the screen, and itpersist in operating system.
> Value of the/sys/class/backlight/acpi_video0/brightness indicates
> maximumbrightness (20) even if minimal was set before boot. Kernel
> radeon driver maintainers said, that backlight is driven by APCI
> drivers, so I'm here to ask for help :)
> How can I help to debug this issue? I'm able to recompile kernel and
> apply patches, as well as do some tests. Unfortunately I'm unable to
> write or correct driver code.
> RegardsArtur
> --
> Każdy problem ma swoje rozwiązanie, zatem
> jeżeli nie ma rozwiązania to nie ma problemu.
> --
> To unsubscribe from this list: send the line "unsubscribe linux-acpi"
> in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
>
You can try to put kernel parameter:
acpi_osi="!Windows 2009"
to /boot/grub/menu.lst, then reboot look at maybe better.
And,
could you please kindly share DSDT and dmidecode to me?
Plesae login by root then:
% acpidump > acpidump.dat
% dmidecode > dmidecode.log
Thanks a lot!
Joey Lee
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fwd: [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook 8560w)
[not found] ` <CAEPe-G+iooX_BOD=5m1nMgn+t63XGsLR+4JCfvHKOyTx98qydg@mail.gmail.com>
@ 2011-12-21 4:55 ` joeyli
2011-12-21 9:42 ` Artur Flinta
0 siblings, 1 reply; 14+ messages in thread
From: joeyli @ 2011-12-21 4:55 UTC (permalink / raw)
To: Artur Flinta; +Cc: linux-acpi, platform-driver-x86
於 六,2011-12-10 於 11:54 +0100,Artur Flinta 提到:
> Hi Joey!
>
> On Fri, Dec 9, 2011 at 3:54 PM, joeyli <jlee@suse.com> wrote:
> >
> > You can try to put kernel parameter:
> >
> > acpi_osi="!Windows 2009"
> >
> > to /boot/grub/menu.lst, then reboot look at maybe better.
>
> No change for me :(
>
> > And,
> > could you please kindly share DSDT and dmidecode to me?
> > Plesae login by root then:
> > % acpidump > acpidump.dat
> > % dmidecode > dmidecode.log
>
> Sure, in attachment.
>
> Regards
> Artur
>
>
Just checked your DSDT, didn't see _BCM implementation on this machines,
and also didn't see useful _Q event function.
Could you please help to enable acpi debug log?
acpi.debug_level=0x2 acpi.debug_layer=0xFFFFFFFF
Please attached dmesg and messages log that cover system boot and
pressed brightness key a couple of times.
And,
Please also monitor does there have any value of gpe was increased when
you press brightness keys:
watch -n 1 cat /sys/firmware/acpi/interrupts/gpe[012][0123456789ABCDEF]
Please tell me which gpe's value increased if you found.
Thanks a lot!
Joey Lee
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fwd: [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook 8560w)
2011-12-21 4:55 ` joeyli
@ 2011-12-21 9:42 ` Artur Flinta
2012-01-20 3:35 ` joeyli
0 siblings, 1 reply; 14+ messages in thread
From: Artur Flinta @ 2011-12-21 9:42 UTC (permalink / raw)
To: joeyli; +Cc: linux-acpi, platform-driver-x86
[-- Attachment #1: Type: text/plain, Size: 886 bytes --]
Hi Joey!
On Wed, Dec 21, 2011 at 5:55 AM, joeyli <jlee@suse.com> wrote:
> Could you please help to enable acpi debug log?
> acpi.debug_level=0x2 acpi.debug_layer=0xFFFFFFFF
>
> Please attached dmesg and messages log that cover system boot and
> pressed brightness key a couple of times.
Added debug parameters, restarted, after GNOME loaded pressed dozen of
times brightness shortcuts... logs in attachment.
> And,
> Please also monitor does there have any value of gpe was increased when
> you press brightness keys:
>
> watch -n 1 cat /sys/firmware/acpi/interrupts/gpe[012][0123456789ABCDEF]
>
> Please tell me which gpe's value increased if you found.
Unfortunately none of values have changed (almost all stated 0, one 504).
Regards
Artur
--
Każdy problem ma swoje rozwiązanie, zatem
jeżeli nie ma rozwiązania to nie ma problemu.
[-- Attachment #2: dmesg.txt.gz --]
[-- Type: application/x-gzip, Size: 22458 bytes --]
[-- Attachment #3: messages.txt.gz --]
[-- Type: application/x-gzip, Size: 19709 bytes --]
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fwd: [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook 8560w)
2011-12-21 9:42 ` Artur Flinta
@ 2012-01-20 3:35 ` joeyli
[not found] ` <CAEPe-G+H6CDDzg9-fXZK4MJbKw_-MJFSMheCL9=yN4Gt=fmaTQ@mail.gmail.com>
0 siblings, 1 reply; 14+ messages in thread
From: joeyli @ 2012-01-20 3:35 UTC (permalink / raw)
To: Artur Flinta; +Cc: linux-acpi, platform-driver-x86
Hi Artur,
Sorry for I am late to reply you.
於 三,2011-12-21 於 10:42 +0100,Artur Flinta 提到:
> Hi Joey!
>
> On Wed, Dec 21, 2011 at 5:55 AM, joeyli <jlee@suse.com> wrote:
> > Could you please help to enable acpi debug log?
> > acpi.debug_level=0x2 acpi.debug_layer=0xFFFFFFFF
> >
> > Please attached dmesg and messages log that cover system boot and
> > pressed brightness key a couple of times.
>
> Added debug parameters, restarted, after GNOME loaded pressed dozen of
> times brightness shortcuts... logs in attachment.
>
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
And, please remember press brightness function key a couple of times
before you dump the dmesg and messages log.
> > And,
> > Please also monitor does there have any value of gpe was increased when
> > you press brightness keys:
> >
> > watch -n 1 cat /sys/firmware/acpi/interrupts/gpe[012][0123456789ABCDEF]
> >
> > Please tell me which gpe's value increased if you found.
>
> Unfortunately none of values have changed (almost all stated 0, one 504).
>
hmm..... that mean the brightness function key does not emit acpi/wmi
event.
Please help to check the raw scan code from the function key:
+ please add kernel parameter atkbd.softraw=0 to /boot/grub/menu.list
+ please switch to console 1, then run:
showkey -s
Press backlight function key and look at maybe have scan code capture by showkey.
Thanks a lot!
Joey lee
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fwd: [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook 8560w)
[not found] ` <CAEPe-G+H6CDDzg9-fXZK4MJbKw_-MJFSMheCL9=yN4Gt=fmaTQ@mail.gmail.com>
@ 2012-01-22 1:45 ` joeyli
[not found] ` <CAEPe-GKff7y1g4qc5gSz4vuhz5P0XpGgPTO570YzkjO6AZNV4A@mail.gmail.com>
0 siblings, 1 reply; 14+ messages in thread
From: joeyli @ 2012-01-22 1:45 UTC (permalink / raw)
To: Artur Flinta; +Cc: linux-acpi, platform-driver-x86
於 五,2012-01-20 於 22:38 +0100,Artur Flinta 提到:
> Hi Joey!
>
> On Fri, Jan 20, 2012 at 4:35 AM, joeyli <jlee@suse.com> wrote:
> > Sorry for I am late to reply you.
>
> No problem :)
>
> > 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
> >
> > And, please remember press brightness function key a couple of times
> > before you dump the dmesg and messages log.
>
> Cause the brightness function key does not emit acpi/wmi event I'll
> skip this step.
>
OK
> > Please help to check the raw scan code from the function key:
> >
> > + please add kernel parameter atkbd.softraw=0 to /boot/grub/menu.list
> > + please switch to console 1, then run:
> > showkey -s
> >
> > Press backlight function key and look at maybe have scan code capture by showkey.
>
> Brightness increase: 0xe0 0x54 0xe0 0xd4
> Brightness decrease: 0xe0 0x4c 0xe0 0xcc
>
> Regards
> Artur
>
#define KEY_BRIGHTNESSDOWN 224
#define KEY_BRIGHTNESSUP 225
Suggest you can try to run the following command before run X-windows:
setkeycodes e054 224
setkeycodes e04c 225
If it works, then we can add the above rules to udev keymaps.
Thanks a lot!
Joey Lee
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fwd: [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook 8560w)
[not found] ` <CAEPe-GKff7y1g4qc5gSz4vuhz5P0XpGgPTO570YzkjO6AZNV4A@mail.gmail.com>
@ 2012-01-22 23:55 ` joeyli
[not found] ` <CAEPe-G+jNsa5VScrk-Nii2e=0U5bVWtcCT5apOy0BAJrjKri4Q@mail.gmail.com>
0 siblings, 1 reply; 14+ messages in thread
From: joeyli @ 2012-01-22 23:55 UTC (permalink / raw)
To: Artur Flinta; +Cc: linux-acpi, platform-driver-x86
於 日,2012-01-22 於 14:17 +0100,Artur Flinta 提到:
> Hi Joey!
>
> > #define KEY_BRIGHTNESSDOWN 224
> > #define KEY_BRIGHTNESSUP 225
> >
> > Suggest you can try to run the following command before run X-windows:
> >
> > setkeycodes e054 224
> > setkeycodes e04c 225
>
> I've run above commands (setkeycodes), and started X-window, then
> pressed several times brightness keys... and noticed something like
> this in dmesg:
>
> [107404.053624] pkexec[11999]: aflinta: Executing command [USER=root]
> [TTY=unknown] [CWD=/home/aflinta]
> [COMMAND=/usr/libexec/gsd-backlight-helper --set-brightness 5]
> [107405.449578] pkexec[12003]: pam_systemd(polkit-1:session): Failed
> to create session: Invalid argument
> [107405.450971] pkexec[12003]: aflinta: Executing command [USER=root]
> [TTY=unknown] [CWD=/home/aflinta]
> [COMMAND=/usr/libexec/gsd-backlight-helper --set-brightness 6]
> [107405.923167] pkexec[12011]: pam_systemd(polkit-1:session): Failed
> to create session: Invalid argument
> [107405.924625] pkexec[12011]: aflinta: Executing command [USER=root]
> [TTY=unknown] [CWD=/home/aflinta]
> [COMMAND=/usr/libexec/gsd-backlight-helper --set-brightness 4]
> [107406.197956] pkexec[12019]: pam_unix(polkit-1:session): session
> opened for user root by (uid=1000)
> [107406.199010] pkexec[12019]: aflinta: Executing command [USER=root]
> [TTY=unknown] [CWD=/home/aflinta]
> [COMMAND=/usr/libexec/gsd-backlight-helper --set-brightness 2]
>
> But brightness haven't changed. I think that this is quite similar to
> my first tries to directly write brightness value to
Yes, you are right. At least we fix the hotkey event problem.
> /sys/class/backlight/acpi_video0/brightness (as described in my first
> post) - but without any success.
>
Yes! we still need fix the problem with backlight control. Please kindly
give me the result after add the following debug parameter:
acpi.debug_level=0xF acpi.debug_layer=0xFFFFFFFF log_buf_len=5M
And,
Did you try the following kernel parameter?
acpi_backlight=vendor
Please try it!
There has a write brightness command 0x06 in WHCM method, WHCM call by
WMAA.
I think might need implement 0x06 command support in hp-wmi.c,
currently, I didn't see it.
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fwd: [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook 8560w)
[not found] ` <CAEPe-G+jNsa5VScrk-Nii2e=0U5bVWtcCT5apOy0BAJrjKri4Q@mail.gmail.com>
@ 2012-01-24 0:58 ` joeyli
[not found] ` <CAEPe-GLe9d7V9YLq+gGpb8N+a-9ELzeuvLbr=gKFbWU4JJxV-Q@mail.gmail.com>
0 siblings, 1 reply; 14+ messages in thread
From: joeyli @ 2012-01-24 0:58 UTC (permalink / raw)
To: Artur Flinta; +Cc: linux-acpi, platform-driver-x86
On Mon, 2012-01-23 at 15:45 +0100, Artur Flinta wrote:
> Hi!
>
> On Mon, Jan 23, 2012 at 12:55 AM, joeyli <jlee@suse.com> wrote:
> > Yes! we still need fix the problem with backlight control. Please kindly
> > give me the result after add the following debug parameter:
> > acpi.debug_level=0xF acpi.debug_layer=0xFFFFFFFF log_buf_len=5M
> >
>
> I did it and log is in attachment.
>
Thanks, but looks like your kernel didn't enable
CONFIG_ACPI_DEBUG=y
So, doesn't show up any acpi debug log in messages.
> > And,
> > Did you try the following kernel parameter?
> > acpi_backlight=vendor
>
> Sure, but after applying it, backlight control keys doesn't work
> anymore, there is also no any message in the log.
>
Does it work set backlight level by sysfs?
echo 9 > /sys/class/backlight/acpi_video0/brightness
> I've also checked command: watch -n 1 cat
> /sys/firmware/acpi/interrupts/gpe[012][0123456789ABCDEF]
> but nothing changed too.
>
> Regards
> Artur
I think don't neet test gpe anymore, because we already know function
key emit scancode.
Thanks a lot!
Joey Lee
^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fwd: [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook 8560w)
[not found] ` <CAEPe-GLe9d7V9YLq+gGpb8N+a-9ELzeuvLbr=gKFbWU4JJxV-Q@mail.gmail.com>
@ 2012-01-25 1:52 ` joeyli
2012-01-26 6:43 ` Artur Flinta
0 siblings, 1 reply; 14+ messages in thread
From: joeyli @ 2012-01-25 1:52 UTC (permalink / raw)
To: Artur Flinta; +Cc: linux-acpi, platform-driver-x86
於 二,2012-01-24 於 16:25 +0100,Artur Flinta 提到:
> Hi!
>
> > Thanks, but looks like your kernel didn't enable
> > CONFIG_ACPI_DEBUG=y
> >
> > So, doesn't show up any acpi debug log in messages.
>
> Fixed, now using kernel-debug package ;) Quite huge in attachment.
>
I just found the _BCM in your SSDT3 table, I am tracing it:
Method (_BCM, 1, Serialized)
{
Store (\_SB.BCM, Arg0)
Local0
If (Local0)
{
Store (BRID, Local1)
If (LEqual (SBRV (), 0x00))
{
\_SB.SSMI (0xEA74, 0x04, Local1, 0x00, 0x00)
}
Signal (\_SB.BEVT)
}
}
> > Does it work set backlight level by sysfs?
> > echo 9 > /sys/class/backlight/acpi_video0/brightness
>
> if kernel is booted with acpi_backlight=vendor parameter, then there
> are no entries in /sys/class/backlight directory.
>
OH! you are right, sorry I forgot it.
Thanks a lot!
Joey Lee
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fwd: [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook 8560w)
2012-01-25 1:52 ` joeyli
@ 2012-01-26 6:43 ` Artur Flinta
2012-01-26 16:40 ` joeyli
0 siblings, 1 reply; 14+ messages in thread
From: Artur Flinta @ 2012-01-26 6:43 UTC (permalink / raw)
To: joeyli; +Cc: linux-acpi, platform-driver-x86
Hi!
> I just found the _BCM in your SSDT3 table, I am tracing it:
How can I help now?
Or I have to just wait for patch? ;)
Regards
Artur
--
Każdy problem ma swoje rozwiązanie, zatem
jeżeli nie ma rozwiązania to nie ma problemu.
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To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@vger.kernel.org
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: Fwd: [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook 8560w)
2012-01-26 6:43 ` Artur Flinta
@ 2012-01-26 16:40 ` joeyli
0 siblings, 0 replies; 14+ messages in thread
From: joeyli @ 2012-01-26 16:40 UTC (permalink / raw)
To: Artur Flinta; +Cc: linux-acpi, platform-driver-x86
於 四,2012-01-26 於 07:43 +0100,Artur Flinta 提到:
> Hi!
>
> > I just found the _BCM in your SSDT3 table, I am tracing it:
>
> How can I help now?
> Or I have to just wait for patch? ;)
>
> Regards
> Artur
>
I hope so, will do my best! :-)
Joey Lee
--
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^ permalink raw reply [flat|nested] 14+ messages in thread
* Re: [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook 8560w)
2011-11-21 19:45 ` Deucher, Alexander
@ 2011-11-21 19:53 ` Artur Flinta
0 siblings, 0 replies; 14+ messages in thread
From: Artur Flinta @ 2011-11-21 19:53 UTC (permalink / raw)
To: Deucher, Alexander; +Cc: linux-kernel, airlied
> The driver doesn't handle the backlight at all. We leave it up to ACPI.
Thanks, maybe You know who should I contact to report this and try to
help to resolve this issue?
Regards
Artur
--
Każdy problem ma swoje rozwiązanie, zatem
jeżeli nie ma rozwiązania to nie ma problemu.
^ permalink raw reply [flat|nested] 14+ messages in thread
* RE: [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook 8560w)
2011-11-21 19:03 Artur Flinta
@ 2011-11-21 19:45 ` Deucher, Alexander
2011-11-21 19:53 ` Artur Flinta
0 siblings, 1 reply; 14+ messages in thread
From: Deucher, Alexander @ 2011-11-21 19:45 UTC (permalink / raw)
To: Artur Flinta, linux-kernel; +Cc: airlied
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset="utf-8", Size: 1371 bytes --]
> -----Original Message-----
> From: Artur Flinta [mailto:aflinta@gmail.com]
> Sent: Monday, November 21, 2011 2:04 PM
> To: linux-kernel@vger.kernel.org
> Cc: Deucher, Alexander; airlied@redhat.com
> Subject: [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook
> 8560w)
>
> Hi!
>
> I have HP Elitebook 8560w with FirePro M5950, Fedora 16, kernel 3.1.1, xorg
> ati driver 6.14.3 and issues with screen backlight - can't dim it.I can write to
> /sys/class/backlight/acpi_video0/brightness values from 0 to 20 (as stated in
> max_brightness), but it have no effect on the screen, values in brightness as
> well as in actual_brightness reflects written number.
> Before system boot, I can change brightness of the screen, and it persist in
> operating system. Value of the /sys/class/backlight/acpi_video0/brightness
> indicates maximum brightness (20) even if minimal was set before boot. It
> seems that built in kernel radeon driver does not correctly handle backlight
> on this hardware.
The driver doesn't handle the backlight at all. We leave it up to ACPI.
Alex
>
> Regards
> Artur
> --
> Każdy problem ma swoje rozwiÄ
zanie, zatem jeżeli nie ma rozwiÄ
zania to nie
> ma problemu.
ÿôèº{.nÇ+·®+%Ëÿ±éݶ\x17¥wÿº{.nÇ+·¥{±þG«éÿ{ayº\x1dÊÚë,j\a¢f£¢·hïêÿêçz_è®\x03(éÝ¢j"ú\x1a¶^[m§ÿÿ¾\a«þG«éÿ¢¸?¨èÚ&£ø§~á¶iOæ¬z·vØ^\x14\x04\x1a¶^[m§ÿÿÃ\fÿ¶ìÿ¢¸?I¥
^ permalink raw reply [flat|nested] 14+ messages in thread
* [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook 8560w)
@ 2011-11-21 19:03 Artur Flinta
2011-11-21 19:45 ` Deucher, Alexander
0 siblings, 1 reply; 14+ messages in thread
From: Artur Flinta @ 2011-11-21 19:03 UTC (permalink / raw)
To: linux-kernel; +Cc: alexander.deucher, airlied
Hi!
I have HP Elitebook 8560w with FirePro M5950, Fedora 16, kernel 3.1.1,
xorg ati driver 6.14.3 and issues with screen backlight - can't dim
it.I can write to /sys/class/backlight/acpi_video0/brightness values
from 0 to 20 (as stated in max_brightness), but it have no effect on
the screen, values in brightness as well as in actual_brightness
reflects written number.
Before system boot, I can change brightness of the screen, and it
persist in operating system. Value of the
/sys/class/backlight/acpi_video0/brightness indicates maximum
brightness (20) even if minimal was set before boot. It seems that
built in kernel radeon driver does not correctly handle backlight on
this hardware.
Regards
Artur
--
Każdy problem ma swoje rozwiązanie, zatem
jeżeli nie ma rozwiązania to nie ma problemu.
^ permalink raw reply [flat|nested] 14+ messages in thread
end of thread, other threads:[~2012-01-26 16:45 UTC | newest]
Thread overview: 14+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-11-23 20:34 [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook 8560w) Artur Flinta
[not found] ` <CAGB3EUR750VpHdvrZ25mn9bcS-4ZT+BSJ_zD4-sRncyYNT=0Zg@mail.gmail.com>
2011-12-09 14:54 ` Fwd: " joeyli
[not found] ` <CAEPe-G+iooX_BOD=5m1nMgn+t63XGsLR+4JCfvHKOyTx98qydg@mail.gmail.com>
2011-12-21 4:55 ` joeyli
2011-12-21 9:42 ` Artur Flinta
2012-01-20 3:35 ` joeyli
[not found] ` <CAEPe-G+H6CDDzg9-fXZK4MJbKw_-MJFSMheCL9=yN4Gt=fmaTQ@mail.gmail.com>
2012-01-22 1:45 ` joeyli
[not found] ` <CAEPe-GKff7y1g4qc5gSz4vuhz5P0XpGgPTO570YzkjO6AZNV4A@mail.gmail.com>
2012-01-22 23:55 ` joeyli
[not found] ` <CAEPe-G+jNsa5VScrk-Nii2e=0U5bVWtcCT5apOy0BAJrjKri4Q@mail.gmail.com>
2012-01-24 0:58 ` joeyli
[not found] ` <CAEPe-GLe9d7V9YLq+gGpb8N+a-9ELzeuvLbr=gKFbWU4JJxV-Q@mail.gmail.com>
2012-01-25 1:52 ` joeyli
2012-01-26 6:43 ` Artur Flinta
2012-01-26 16:40 ` joeyli
-- strict thread matches above, loose matches on Subject: below --
2011-11-21 19:03 Artur Flinta
2011-11-21 19:45 ` Deucher, Alexander
2011-11-21 19:53 ` Artur Flinta
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