Upstream, the kernel team is saying that it is a platform driver issue
or bios... sony is not supporting linux, so I think the only way to have
it fix before 2050 is to bring the nvidia driver to manage backlight
(also in /sys and /proc) so adding nvidia pkg to the report...
** Also affects: nvidia-graphics-drivers-180 (Ubuntu)
Importance: Undecided
Status: New
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backlight not appearing in sysfs nor laptop_panel in lshal for sony vaio fz
https://bugs.launchpad.net/bugs/377353
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