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Groups > linux.debian.kernel > #83835

Bug#1076110: Confirmed, also affects keyboard backlight

From Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Newsgroups linux.debian.bugs.dist, linux.debian.kernel
Subject Bug#1076110: Confirmed, also affects keyboard backlight
Date 2024-09-04 22:20 +0200
Message-ID <Jj4DT-9YGC-1@gated-at.bofh.it> (permalink)
References (1 earlier) <JbRs5-5hoK-5@gated-at.bofh.it> <IYNFE-1dMg-9@gated-at.bofh.it> <JbRs5-5hoK-3@gated-at.bofh.it> <IYNFE-1dMg-9@gated-at.bofh.it> <JbRs5-5hoK-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

Cross-posted to 2 groups.

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Hello,

On Thu, Aug 15, 2024 at 03:38:16PM -0700, Mark Wittenberg wrote:
> On Tue, 6 Aug 2024 08:14:55 +0100 Ralph Martin <MartinRR@cardiff.ac.uk>
> wrote:
> > I can confirm this issue on an LG Gram 16Z90Q laptop. A further side
> > effect is that keyboard backlight control is affected.
> 
> On my LG 17Z90R-K.ADS9U1 (running Linux Mint 21.3) the TLP STOP limit worked
> up through and including kernel 6.9.6, and failed to work on kernel 6.9.9. 
> I haven't tested on 6.9.7 or 6.9.8 but as the OP saw the failure on 6.9.7
> (or maybe 6.9.8) I would guess that the problem began in 6.9.7.  I can test
> 6.9.7 and 6.9.8 if that would be helpful.  The keyboard backlighting appears
> to be functioning on 6.9.9.

the following things would be helpful to debug this issue:

 - There are newer kernels packages in trixie, unstable and experimental
   in the meantime. Do these happen to fix the issue?
 - The information if 6.9.7 is good or bad in this respect
 - boot log from both a working and a broken setup from the same machine
 - A git bisection between 6.9.6 and 6.9.8

If you can provide any of these, please do so.

Best regards
Uwe

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Thread

Bug#1076110: linux-image-6.9.8-amd64: Battery care and some function keys not working on LG Gram with kernel 6.9.x Iacopo Benesperi <spam@iacchi.org> - 2024-07-11 00:10 +0200
  Bug#1076110: Confirmed, also affects keyboard backlight Uwe Kleine-König <u.kleine-koenig@baylibre.com> - 2024-09-04 22:20 +0200
  Processed: Re: Bug#1076110: Confirmed, also affects keyboard  backlight "Debian Bug Tracking System" <owner@bugs.debian.org> - 2024-09-05 10:10 +0200

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