On Tuesday 2012-06-05 18:29, Alan Cox wrote: >> >> [Wortmann AG's terra Pad 1051, with a 8086:4102 display chip] > >0x4102 is an Oaktrail device (GMA600). The driver supports it providing >you have the GMA600 option set. Thanks for the info. Setting GMA600=y works, as in, it results in graphical mode on tty1. However, the gma600 driver seems to default to a backlight value of "0" in Linux 3.4.1; getting a dark screen after loading gma500_gfx.ko is rather unexpected. Furthermore, there are four entries in sysfs, and the one required to change the panel brightness is acpi_video2 (and this one alone). Changing any others, e.g. acpi_video0/brightness, does not have any visible effect. linux-kisn:/sys/class/backlight # ls -l total 0 lrwxrwxrwx 1 root root 0 Jun 7 17:31 acpi_video0 -> ../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video0 lrwxrwxrwx 1 root root 0 Jun 7 17:31 acpi_video1 -> ../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video1 lrwxrwxrwx 1 root root 0 Jun 7 17:31 acpi_video2 -> ../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video2 lrwxrwxrwx 1 root root 0 Jun 7 17:31 oaktrail-bl -> ../../devices/virtual/backlight/oaktrail-bl _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
