On Tuesday 28 October 2008 04:15:19 pm Rafael J. Wysocki wrote: > On Tuesday, 28 of October 2008, Thomas Renninger wrote: > > On Monday 27 October 2008 17:52:55 Andrey Borzenkov wrote: > > > On Monday 08 September 2008, Thomas Renninger wrote: > > > > On Saturday 06 September 2008 09:19:59 am Andrey Borzenkov wrote: > > > > > 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. > > > > > > > > It is in latest ACPI test branch queued for 2.6.28. > > > > > > It is still not in rc2; is it scheduled for 2.6.28 or delayed further? > > > > Right, it's not there. > > Len, what happened with the: > > "Check for ACPI backlight support otherwise use vendor ACPIdrivers - > > version 4" patches? > > > > They are pretty essential for video.ko. > > Otherwise graphics devices may get double poked (through vendor_acpi.ko > > drivers) or may register for graphics cards which are not there. > > Do you have a pointer to those patches? I remember they were in Andi's ACPI test branch already. Andi/Len do you have an idea what happened to them? Thomas -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
