On Saturday 06 September 2008, Andrey Borzenkov wrote: > I have now two different devices that refer to the same hardware: > > lrwxrwxrwx 1 root root 0 2008-09-06 11:04 acpi_video0 -> ../../devices/virtual/backlight/acpi_video0/ > lrwxrwxrwx 1 root root 0 2008-09-06 11:04 toshiba -> ../../devices/virtual/backlight/toshiba/ > > Unfortunately, due to ACPI implementation the acpi_video0 one is much > inferior (as it provides only effectively two levels instead of 8); > and user level tools are apparently quite confused which one to select. > > Is there any mechanism that would allow tochiba_acpi to claim brightness > for internal LCD screen that video would not attempt to grab it too? > > Of course manually disabling brightness handling in video is always possible, Actually it is not. brightness_switch_enabled only disables event handling; it still resets actual brightness on loading and creates sysfs files to confuse user space. > still is nice for this to be handled automatically. >
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