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