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Ever since I upgraded to 2.6.30, I have been unable to control my laptop's brightness; it's always at max.
grep -R . /proc/acpi/video/*
/proc/acpi/video/UVGA/HDMI/EDID:<not supported>
/proc/acpi/video/UVGA/HDMI/brightness:<not supported>
/proc/acpi/video/UVGA/HDMI/state:state: 0x1d
/proc/acpi/video/UVGA/HDMI/state:query: 0x00
/proc/acpi/video/UVGA/HDMI/info:device_id: 0x0121
/proc/acpi/video/UVGA/HDMI/info:type: UNKNOWN
/proc/acpi/video/UVGA/HDMI/info:known by bios: no
/proc/acpi/video/UVGA/TV/EDID:<not supported>
/proc/acpi/video/UVGA/TV/brightness:<not supported>
/proc/acpi/video/UVGA/TV/state:state: 0x1d
/proc/acpi/video/UVGA/TV/state:query: 0x00
/proc/acpi/video/UVGA/TV/info:device_id: 0x0200
/proc/acpi/video/UVGA/TV/info:type: UNKNOWN
/proc/acpi/video/UVGA/TV/info:known by bios: no
/proc/acpi/video/UVGA/LCD/EDID:<not supported>
/proc/acpi/video/UVGA/LCD/brightness:<not supported>
/proc/acpi/video/UVGA/LCD/state:state: 0x1f
/proc/acpi/video/UVGA/LCD/state:query: 0x01
/proc/acpi/video/UVGA/LCD/info:device_id: 0x0110
/proc/acpi/video/UVGA/LCD/info:type: UNKNOWN
/proc/acpi/video/UVGA/LCD/info:known by bios: no
/proc/acpi/video/UVGA/CRT/EDID:<not supported>
/proc/acpi/video/UVGA/CRT/brightness:<not supported>
/proc/acpi/video/UVGA/CRT/state:state: 0x1f
/proc/acpi/video/UVGA/CRT/state:query: 0x01
/proc/acpi/video/UVGA/CRT/info:device_id: 0x0100
/proc/acpi/video/UVGA/CRT/info:type: UNKNOWN
/proc/acpi/video/UVGA/CRT/info:known by bios: no
/proc/acpi/video/UVGA/DOS:DOS setting: <0>
/proc/acpi/video/UVGA/POST:<not supported>
/proc/acpi/video/UVGA/POST_info:<not supported>
/proc/acpi/video/UVGA/ROM:<TODO>
/proc/acpi/video/UVGA/info:Switching heads: yes
/proc/acpi/video/UVGA/info:Video ROM: no
/proc/acpi/video/UVGA/info:Device to be POSTed on boot: no
Whenever I try to adjust the brightness via Fn keys, it spits out the following in dmesg:
ACPI: Failed to switch the brightness
My laptop is an HP dv6618ca.
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Same here. I think it is a bug in the kernel.
R.
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What model laptop do you have?
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What model laptop do you have?
I have an Acer Aspire 7720
R.
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Same here. I think it is a bug in the kernel.
R.
I've looked around the kernel's bugtracker, but it doesn't seem like anyone's reported it yet.
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Have you tried http://bbs.archlinux.org/viewtopic.php?id=73889?
Last edited by arkham (2009-07-27 01:09:38)
"I'm Winston Wolfe. I solve problems."
~ Need moar games? [arch-games] ~ [aurcheck] AUR haz updates? ~
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Have you tried http://bbs.archlinux.org/viewtopic.php?id=73889?
Yup. I've tried all the solutions in that thread.
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You might try the following, works for me on my hp dv 3550eg.
acpi_backlight=vendor
&&
http://aur.archlinux.org/packages.php?ID=25467
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You might try the following, works for me on my hp dv 3550eg.
acpi_backlight=vendor
&&
http://aur.archlinux.org/packages.php?ID=25467
nvidia-bl compiles fine, but whenever I try to load the module, it says,
FATAL: Error inserting nvidia_bl (/lib/modules/2.6.30-ARCH/kernel/drivers/nvidia_bl.ko): No such device
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I thought your NVIDIA GeForce Go 7150M would be compatible to this driver, but it does not seem to be, sorry.
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In the mean time I've downgraded to 2.6.29 and all is well.
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Ahadiel wrote:What model laptop do you have?
I have an Acer Aspire 7720
R.
So do I, I have the same laptop and saw the same issue. It is a bug on the kernel. The problem will be fixed in kernel 2.6.31, it is caused by this bug:
http://bugzilla.kernel.org/show_bug.cgi?id=13121
If you can rebuild a kernel with the patch http://bugzilla.kernel.org/attachment.cgi?id=22001 , it should fix the problem (it did for me), or - for the time being - stay with 2.6.29 until 2.6.31 comes out.
Last edited by Renan Birck (2009-07-30 01:59:04)
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I wonder if that would fix it for me too. Guess I'll rebuild 2.6.30 and find out.
Thanks for the info Renan Birck.
Edit: Could you upload the patch? The attachment ID in your link is invalid.
Edit2: Nevermind, it doesn't look like the patch would fix anything at all for me.
Edit3: I managed to fix my brightness issues on 2.6.30 by adding the following to the end of my kernel line in menu.lst:
ACPI_VIDEO=y VIDEO_OUTPUT_CONTROL=y
Last edited by Ahadiel (2009-07-29 23:08:40)
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I wonder if that would fix it for me too. Guess I'll rebuild 2.6.30 and find out.
Thanks for the info Renan Birck.
Edit: Could you upload the patch? The attachment ID in your link is invalid.
Edit2: Nevermind, it doesn't look like the patch would fix anything at all for me.
Edit3: I managed to fix my brightness issues on 2.6.30 by adding the following to the end of my kernel line in menu.lst:
ACPI_VIDEO=y VIDEO_OUTPUT_CONTROL=y
Thank you, that trick fixed the brighness issue with my dv6000.
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Ahadiel wrote:I wonder if that would fix it for me too. Guess I'll rebuild 2.6.30 and find out.
Thanks for the info Renan Birck.
Edit: Could you upload the patch? The attachment ID in your link is invalid.
Edit2: Nevermind, it doesn't look like the patch would fix anything at all for me.
Edit3: I managed to fix my brightness issues on 2.6.30 by adding the following to the end of my kernel line in menu.lst:
ACPI_VIDEO=y VIDEO_OUTPUT_CONTROL=y
Thank you, that trick fixed the brighness issue with my dv6000.
Which video chipset does your dv6000 have? The brightness issue is back for me -_-
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I have a dv6000 as well and am experiencing the same problems. Its gota Geforce 7150M inside it and i am running 2.6.31.
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I have a dv6000 as well and am experiencing the same problems. Its gota Geforce 7150M inside it and i am running 2.6.31.
Sigh, I hope this gets fixed.
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You might try the following, works for me on my hp dv 3550eg.
acpi_backlight=vendor
&&
http://aur.archlinux.org/packages.php?ID=25467
Long time I'm keeping watch threads about backlight and brightness to see a solution for my Aspire 6935.
Unfortunately also this didn't solve the issue
F
do it good first, it will be faster than do it twice the saint
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I wonder if that would fix it for me too. Guess I'll rebuild 2.6.30 and find out.
Thanks for the info Renan Birck.
Edit: Could you upload the patch? The attachment ID in your link is invalid.
Edit2: Nevermind, it doesn't look like the patch would fix anything at all for me.
Edit3: I managed to fix my brightness issues on 2.6.30 by adding the following to the end of my kernel line in menu.lst:
ACPI_VIDEO=y VIDEO_OUTPUT_CONTROL=y
I have kernel 2.6.31.3 on my HP 2530p and i also have this issue. I have tried what Ahadiel suggested, but it doesent help.
I really hope the kernel folks get this sorted out.
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