GNU bug report logs - #76554
Laptop screen blank after kexec reboot

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Message #23 received at 76554 <at> debbugs.gnu.org (full text, mbox):

From: Ludovic Courtès <ludo <at> gnu.org>
To: Evgeny Pisemsky <mail <at> pisemsky.site>
Cc: 76554 <at> debbugs.gnu.org, Simon Streit <simon <at> netpanic.org>
Subject: Re: bug#76554: Laptop screen blank after kexec reboot
Date: Mon, 14 Apr 2025 09:04:31 +0200

Hi,

Evgeny Pisemsky <mail <at> pisemsky.site> writes:

> Hi, in my case I can see something on the screen after reboot, but
> very dark. This hints that the problem in a backlight, and it is so:

Good catch; I just checked and it’s exactly the same for me.

> #+begin_example
> cd /sys/class/backlight/intel_backlight/
>
> cat brightness
> 0
>
> cat max_brightness
> 4437
>
> cat max_brightness > brightness

Which makes me wonder: should we do this in an activation snippet?

Is this an Intel-specific problem?

Thanks,
Ludo’.

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