Backlight Problem auf Intel Laptops

Bei Intel® GL40 Express / Montevina Platform / Graphics Media Accelerator 4500MHD kann es erforderlich sein, das Backlight nach Screensaver / Hibernate / Reboot manuell anzuschalten. Betroffen ist z.B. diese Hardware:

$ sudo lshw -class display
  *-display:0
       description: VGA compatible controller
       product: Mobile 4 Series Chipset Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:44 memory:90000000-903fffff memory:80000000-8fffffff ioport:4110(size=8)
  *-display:1 UNCLAIMED
       description: Display controller
       product: Mobile 4 Series Chipset Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2.1
       bus info: pci@0000:00:02.1
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list
       configuration: latency=0
       resources: memory:93400000-934fffff

Backlight workaround: Set address F4 at 00:02.0 to 0.

# force backlight in /etc/rc.local
/sbin/setpci -s 00:02.0 F4.B=00

helpdesk/issue/intel (zuletzt geändert am 2012-10-18 09:36:32 durch heiner)