@Paolo Pisati, the fix didn't work...
** Changed in: ddcci-driver-linux (Ubuntu)
Status: Confirmed => New
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https://bugs.launchpad.net/bugs/1837073
Title:
linux 5.2.0-8.9 disabled backlight on s390x.
Status in ddcci-driver-linux package in Ubuntu:
New
Status in linux package in Ubuntu:
Confirmed
Bug description:
Looks like ddcci-driver-linux started to fail on s390x with the switch
from kernel 5.0.0-21-generic to 5.2.0-8-generic
http://autopkgtest.ubuntu.com/packages/d/ddcci-driver-linux/eoan/s390x
According to changelog and diff:
- [Config] CONFIG_BACKLIGHT_CLASS_DEVICE=n on s390x
from Seth Forshee.
According to the build log of ddci backlight
rm: cannot remove '.tmp_versions/ddcci-backlight.mod': No such file or
directory
Makefile:227: ================= WARNING ================
Makefile:228: 'SUBDIRS' will be removed after Linux 5.3
Makefile:229: Please use 'M=' or 'KBUILD_EXTMOD' instead
Makefile:230: ==========================================
Makefile:227: ================= WARNING ================
Makefile:228: 'SUBDIRS' will be removed after Linux 5.3
Makefile:229: Please use 'M=' or 'KBUILD_EXTMOD' instead
Makefile:230: ==========================================
ERROR: "devm_backlight_device_register"
[/var/lib/dkms/ddcci/0.3.2/build/ddcci-backlight/ddcci-backlight.ko] undefined!
make[3]: *** [scripts/Makefile.modpost:91: __modpost] Error 1
make[2]: *** [Makefile:1628: modules] Error 2
make[1]: *** [Makefile:37: ddcci-backlight.ko] Error 2
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