** Tags added: bios-outdated-f.48 regression-release
** Summary changed:
- Backlight does not work on intel driver after upgrade from 13.10 - 14.04,
acpi_backlight=vendor solves
+ [HP EliteBook Folio 9470m Notebook PC] Backlight does not work on intel
driver after upgrade from 13.10 - 14.04,
I just booted with acpi_backlight=vendor and that solves the issue.
Happy to help debug the issue to help other users of this hardware avoid
the problem.
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Seems this is a kernel/firmware/acpi issue.
** Package changed: xserver-xorg-video-intel (Ubuntu) = linux (Ubuntu)
** Summary changed:
- Backlight does not work on intel driver after upgrade from 13.10 - 14.04
+ Backlight does not work on intel driver after upgrade from 13.10 - 14.04,
