[Bug 104745] Re: acpi power state changes result in corrupted display [Toshiba Portege R100]

[Luc1972]

Neither do I.  My darling children managed to smash the screen.

 
On 8 Nov 2012, at 12:25, Roy Badami wrote:

> Unfortunately I no longer have a working R100 so I can't test.

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https://bugs.launchpad.net/bugs/104745

Title:
  acpi power state changes result in corrupted display [Toshiba Portege
  R100]

Status in “acpi-support” package in Ubuntu:
  Invalid
Status in “linux” package in Ubuntu:
  Invalid

Bug description:
  [Problem]
  Toshiba Portege R100 hardware has broken ACPI for handling power state changes (e.g. brightness settings), resulting in a corrupted display.  It requires changes to kernel parameters to make the issue go away, as described in this article:
  http://ubuntuforums.org/archive/index.php/t-533793.html

  [Original Report]
  On my Toshiba Portege R100 laptop, with trident driver, any attempt to change the display brightness results in an incorrect resolution.  The screen image is displayed too large by a factor of approximately 2, with only the top left quadrant of the desktop being visible.  This is with Feisty Beta.

  This is particularly troublesome because by default the screen
  brightness is set after logging in...  And also when switching between
  battery and AC.

  As virtual consoles aren't working either, the only workaround when
  this happens is to kill X with Ctrl-Alt-Backspace and log in again.

  Repeat by:

  Boot up and log in,

  or,

  echo 'brightness: 6' > /proc/acpi/toshiba/lcd    # assuming brighness
  not already at 6

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