Messages in this thread | | | Date | Mon, 21 Nov 2011 20:03:55 +0100 | Subject | [Bugreport] Screen backllight issues on FirePro M5950 (HP EliteBook 8560w) | From | Artur Flinta <> |
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Hi!
I have HP Elitebook 8560w with FirePro M5950, Fedora 16, kernel 3.1.1, xorg ati driver 6.14.3 and issues with screen backlight - can't dim it.I can write to /sys/class/backlight/acpi_video0/brightness values from 0 to 20 (as stated in max_brightness), but it have no effect on the screen, values in brightness as well as in actual_brightness reflects written number. Before system boot, I can change brightness of the screen, and it persist in operating system. Value of the /sys/class/backlight/acpi_video0/brightness indicates maximum brightness (20) even if minimal was set before boot. It seems that built in kernel radeon driver does not correctly handle backlight on this hardware.
Regards Artur -- Każdy problem ma swoje rozwiązanie, zatem jeżeli nie ma rozwiązania to nie ma problemu. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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