[Bug 1159771] Re: Toshiba Portege R830-13C no backlight after resume from suspend

[Jaak Simm]

I'm affected by the same bug on Toshiba Satellite laptop in Ubuntu 13.10
(kernel 3.11.0-14-generic). Tried adding acpi_backlight=vendor to grub,
but backlight keys still not working after suspend.

Is there a working workaround for this problem?

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Title:
  Toshiba Portege R830-13C no backlight after resume from suspend

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[Bug 1159771] Re: Toshiba Portege R830-13C no backlight after resume from suspend

[Jaak Simm]

Little-bit more details. The keys work, GUI changes and the value in
/sys/class/backlight/toshiba/brightness changes from 0 to 7 when
changing brightness, however there is no real effect on screen
brightness. There is also
/sys/class/backlight/intel_backlight/brightness file, which is not
affected when changing backlight.

Data about my laptop:

sudo s2ram -n
Machine unknown
This machine can be identified by:
sys_vendor   = TOSHIBA
sys_product  = Satellite R630
sys_version  = PT31LE-01600LG3
bios_version = Version 1.50  

There seems to be a similar bug:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/935778

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https://bugs.launchpad.net/bugs/1159771

Title:
  Toshiba Portege R830-13C no backlight after resume from suspend

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