Re: Screen brightness keys not working

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Hi,

On 7/22/24 5:35 PM, Iñaki Ucar wrote:
> 
> On Mon, 22 Jul 2024 at 17:22, Iñaki Ucar <iucar@xxxxxxxxxxxxxxxxx <mailto:iucar@xxxxxxxxxxxxxxxxx>> wrote:
> 
>     Hi Hans,
> 
>     On Thu, 18 Jul 2024 at 11:28, Hans de Goede <hdegoede@xxxxxxxxxx <mailto:hdegoede@xxxxxxxxxx>> wrote:
> 
>         Hi,
> 
>         On 7/16/24 5:59 PM, Iñaki Ucar wrote:
>         >
>         >
>         > On Tue, 16 Jul 2024 at 12:29, Hans de Goede <hdegoede@xxxxxxxxxx <mailto:hdegoede@xxxxxxxxxx> <mailto:hdegoede@xxxxxxxxxx <mailto:hdegoede@xxxxxxxxxx>>> wrote:
>         >
>         >     Hi,
>         >
>         >     On 7/15/24 9:50 PM, Iñaki Ucar wrote:
>         >     > It's the kernel. Going back to 6.9.6 fixes the issue...
>         >
>         >     Ok, that is a good first step in debugging this.
>         >
>         >     Can you run evtest with the working kernel and then check which
>         >     event node is generating key-presses for the brightness keys,
>         >     that should help narrow it down further.
>         >
>         >     Likely candidates are: "LG WMI hotkeys",
>         >     "AT translated set 2 keyboard", "Video Bus".
>         >
>         >
>         > In "Video Bus", there are KEY_BRIGHTNESSDOWN and KEY_BRIGHTNESSUP that are triggered.
> 
>         Ok, then this likely is not an issue with the lg-laptop driver but rather with
>         the ACPI subsystem.
> 
>         Likely culprit commits which are new in 6.9.7 are:
> 
>         https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/acpi?h=v6.9.7&id=2b2b0ac1533d790690d6d28899f01a2924d54d4d <https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/acpi?h=v6.9.7&id=2b2b0ac1533d790690d6d28899f01a2924d54d4d>
>         https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/acpi?h=v6.9.7&id=9750135f2f326879889ed60ccd68b96572dfa6ee <https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/acpi?h=v6.9.7&id=9750135f2f326879889ed60ccd68b96572dfa6ee>
> 
> 
>         Or maybe:
> 
>         https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/acpi?h=v6.9.7&id=e21a4c9129c72fa54dd00f5ebf71219b41d43c04 <https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/acpi?h=v6.9.7&id=e21a4c9129c72fa54dd00f5ebf71219b41d43c04>
> 
>         But I suspect it is one of the above 2.
> 
>         I have started a 6.9.9 test-build with those 2 patches reverted:
> 
>         https://koji.fedoraproject.org/koji/taskinfo?taskID=120674294 <https://koji.fedoraproject.org/koji/taskinfo?taskID=120674294>
> 
> 
>     Good catch! I confirm that the build above does not have the issues I was experiencing.

Thank you  I have reported this issue to the ACPI maintainer now:

https://lore.kernel.org/linux-acpi/1f76b7e2-1928-4598-8037-28a1785c2d13@xxxxxxxxxx/


> However, with this I have another issue:  when I connect my laptop to my Thunderbolt dock, I see irq/9-acpi constantly spinning the CPU at 40%. :( I had to go back to the previous one.

Ok, that is unfortunate. Can you try powering off the lapto and then directly booting into the test kernel,
without first booting a bad kernel?  I'm wondering if the bad kernel maybe confuses the EC in such a way
that it is still unhappy after a reboot.

Regards,

Hans



>         >     But if none of those 3 reports brightness key presses, please
>         >     try all available /dev/input/event# nodes and please report back
>         >     here the name(e.g. "LG WMI hotkeys") of the /dev/input/event# node
>         >     which is reporting the brightness key presses.
>         >
>         >     Also which kernel version is the first broken kernel version
>         >     for you ?
>         >
>         >
>         > 6.9.7 to 6.9.9 are broken. I also noticed issues with /sys/devices/platform/lg-laptop/battery_care_limit, that reports 0 and cannot be set with those kernels.
>         >
>         > There are commits in the lg-laptop.c file in the 6.10 series that I hope solve these issues, see https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/diff/drivers/platform/x86/lg-laptop.c?id=v6.10&id2=v6.9 <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/diff/drivers/platform/x86/lg-laptop.c?id=v6.10&id2=v6.9> <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/diff/drivers/platform/x86/lg-laptop.c?id=v6.10&id2=v6.9 <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/diff/drivers/platform/x86/lg-laptop.c?id=v6.10&id2=v6.9>>
>         >
>         > Iñaki
>         >  
>         >
>         >
>         >
>         >     Regards,
>         >
>         >     Hans
>         >
>         >
>         >
>         >
>         >
>         >     >
>         >     > Iñaki
>         >     >
>         >     > On Mon, 15 Jul 2024 at 21:34, Iñaki Ucar <iucar@xxxxxxxxxxxxxxxxx <mailto:iucar@xxxxxxxxxxxxxxxxx> <mailto:iucar@xxxxxxxxxxxxxxxxx <mailto:iucar@xxxxxxxxxxxxxxxxx>> <mailto:iucar@xxxxxxxxxxxxxxxxx <mailto:iucar@xxxxxxxxxxxxxxxxx> <mailto:iucar@xxxxxxxxxxxxxxxxx <mailto:iucar@xxxxxxxxxxxxxxxxx>>>> wrote:
>         >     >
>         >     >
>         >     >
>         >     >     On Mon, 15 Jul 2024 at 18:53, Jonathan Wright via devel <devel@xxxxxxxxxxxxxxxxxxxxxxx <mailto:devel@xxxxxxxxxxxxxxxxxxxxxxx> <mailto:devel@xxxxxxxxxxxxxxxxxxxxxxx <mailto:devel@xxxxxxxxxxxxxxxxxxxxxxx>> <mailto:devel@xxxxxxxxxxxxxxxxxxxxxxx <mailto:devel@xxxxxxxxxxxxxxxxxxxxxxx> <mailto:devel@xxxxxxxxxxxxxxxxxxxxxxx <mailto:devel@xxxxxxxxxxxxxxxxxxxxxxx>>>> wrote:
>         >     >
>         >     >         Are you running KDE with HDR enabled by chance?  That will make the keys non-functional.
>         >     >
>         >     >
>         >     >     No, I don't think so. I don't see any HDR option anyways.
>         >     >
>         >     >     Iñaki
>         >     >      
>         >     >
>         >     >
>         >     >         On Mon, Jul 15, 2024 at 3:52 AM Samuel Sieb <samuel@xxxxxxxx <mailto:samuel@xxxxxxxx> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx>> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx>>>> wrote:
>         >     >
>         >     >             On 7/15/24 1:47 AM, Iñaki Ucar wrote:
>         >     >             > On Mon, 15 Jul 2024 at 10:34, Samuel Sieb <samuel@xxxxxxxx <mailto:samuel@xxxxxxxx> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx>> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx>>>
>         >     >             > <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx>> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx>>>>> wrote:
>         >     >             >
>         >     >             >     On 7/15/24 1:23 AM, Iñaki Ucar wrote:
>         >     >             >      >
>         >     >             >      >
>         >     >             >      > On Mon, 15 Jul 2024 at 09:56, Samuel Sieb <samuel@xxxxxxxx <mailto:samuel@xxxxxxxx> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx>> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx>>>
>         >     >             >     <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx>> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx>>>>
>         >     >             >      > <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx>> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx>>> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx>> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx> <mailto:samuel@xxxxxxxx <mailto:samuel@xxxxxxxx>>>>>> wrote:
>         >     >             >      >     You will need to find out what the keys trigger.
>         >     >             >      >     Do you see any messages in the journal when you press the keys?
>         >     >             >      >
>         >     >             >      >
>         >     >             >      > Nothing in the journal.
>         >     >             >      >
>         >     >             >      >     Install "evtest" and try watching various sources to see if
>         >     >             >     you get a
>         >     >             >      >     reaction when pressing the keys.
>         >     >             >      >
>         >     >             >      >
>         >     >             >      > Nothing either. I tried monitoring the keyboard as well as the
>         >     >             >     event fd
>         >     >             >      > called "LG WMI hotkeys", and those keys trigger nothing. :( Does
>         >     >             >     this
>         >     >             >      > mean that it's a kernel issue?
>         >     >             >
>         >     >             >     Probably.  Do you have the "lg-laptop" kernel module loaded?
>         >     >             >
>         >     >             > I do:
>         >     >             > $ lsmod | grep lg
>         >     >             > lg_laptop              32768  0
>         >     >             > sparse_keymap          12288  1 lg_laptop
>         >     >             > i2c_algo_bit           20480  2 xe,i915
>         >     >             > wmi                    36864  3 video,lg_laptop,wmi_bmof
>         >     >
>         >     >             I suggest you contact the mailing list at:
>         >     >             platform-driver-x86@xxxxxxxxxxxxxxx <mailto:platform-driver-x86@xxxxxxxxxxxxxxx> <mailto:platform-driver-x86@xxxxxxxxxxxxxxx <mailto:platform-driver-x86@xxxxxxxxxxxxxxx>> <mailto:platform-driver-x86@xxxxxxxxxxxxxxx <mailto:platform-driver-x86@xxxxxxxxxxxxxxx> <mailto:platform-driver-x86@xxxxxxxxxxxxxxx <mailto:platform-driver-x86@xxxxxxxxxxxxxxx>>>
>         >     >
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>         >     >
>         >     >
>         >     >
>         >     >     --
>         >     >     Iñaki Úcar
>         >     >
>         >     >
>         >     >
>         >     > --
>         >     > Iñaki Úcar
>         >     >
>         >
>         >
>         >
>         > --
>         > Iñaki Úcar
> 
> 
> 
>     -- 
>     Iñaki Úcar
> 
> 
> 
> -- 
> Iñaki Úcar

-- 
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