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[Launchpad Bug Tracker <1156525@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1156525

Title:
  Black screen after wakeup

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  Hi all
  Im testing Ubuntu 13.04 with kernel 3.8.0-ubuntu on my VPCEG13EB (i3/HD3000).
  My notebook have a long-standing bug with backlight: any distro can not change my backlight by default. I Regulate manually my backlight in /sys/class/backlight/intel_backlight/brightness(form 0 to 4882). All distros/kernels/DE regulate the backlight in /sys/class/acpi_video0/brightness(from 0 to 15). Same kernel flags change from ~/acpi_video0 to ~/sony but still not working.
  But it always works on max by default on non-3.8 kernels. On kernel 3.8 when i boot up works ok, but when I sleep/wakeup my backlight is zero, so i cant see nothing in screen. Conecting the notebook on my TV and making an "# echo 4882 > /sys/class/backlight/intel_backlight/brightness" makes everything work fine again.

  My Arch Linux has the same bug when I try 3.8, in 3.7 everything works
  ok.

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