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Groups > linux.debian.kernel > #58457

Bug#868884: linux-source: Kernels 4.x no boot on Dells with no Kbd Backlight

Cross-posted to 2 groups.

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Package: linux-source
Version: 4.1 and up
Severity: normal

Dear Maintainer,

Kernels 4.x backports on jessie, and current 4.9 in stretch won't boot 
on this machine without a tweak.  Hard lockup shortly after boot when
systemd tries to restore a kbd backlight that doesn't exist.

Affects at least two other dell laptop models around 8-10 years old.

The workaround is:
# systemctl mask systemd-backlight@leds\:dell\:\:kbd_backlight.service
 -or- 
kernel parameter 
systemd.restore_state=0

references:
https://github.com/systemd/systemd/issues/1792
https://bugzilla.kernel.org/show_bug.cgi?id=107651

Earlier reports here, I have not seen a similar debian bug reported.
https://bugzilla.redhat.com/show_bug.cgi?id=1253523
https://bugs.archlinux.org/task/47509
https://bbs.archlinux.org/viewtopic.php?id=201523&p=2

Thanks for all the hard work on stretch, it's pretty far out man.

L8r,
bw

-- System Information:
Debian Release: 9.0
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.9.0-3-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages linux-source depends on:
pn  linux-source-4.9  <none>

linux-source recommends no packages.

linux-source suggests no packages.

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Bug#868884: linux-source: Kernels 4.x no boot on Dells with no Kbd Backlight b17 <bwtnguy@yahoo.com> - 2017-07-19 15:30 +0200
  Bug#868884: src:linux: dell::kbd_backlight Causes Powerdevil Lockup on Resume bw <bwtnguy@yahoo.com> - 2017-11-15 19:20 +0100

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