Hi Artur, 於 五，2011-12-09 於 22:41 +0800，Li Joey 提到： > > > ---------- Forwarded message ---------- > From: Artur Flinta <aflinta@xxxxxxxxx> > Date: 2011/11/24 > Subject: [Bugreport] Screen backllight issues on FirePro M5950 (HP > EliteBook 8560w) > To: linux-acpi@xxxxxxxxxxxxxxx > > > 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 > dimit.I can write to /sys/class/backlight/acpi_video0/brightness > valuesfrom 0 to 20 (as stated in max_brightness), but it have no > effect onthe screen, values in brightness as well as in > actual_brightnessreflects written number.Before system boot, I can > change brightness of the screen, and itpersist in operating system. > Value of the/sys/class/backlight/acpi_video0/brightness indicates > maximumbrightness (20) even if minimal was set before boot. Kernel > radeon driver maintainers said, that backlight is driven by APCI > drivers, so I'm here to ask for help :) > How can I help to debug this issue? I'm able to recompile kernel and > apply patches, as well as do some tests. Unfortunately I'm unable to > write or correct driver code. > RegardsArtur > -- > Każdy problem ma swoje rozwiązanie, zatem > jeżeli nie ma rozwiązania to nie ma problemu. > -- > 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 > > You can try to put kernel parameter: acpi_osi="!Windows 2009" to /boot/grub/menu.lst, then reboot look at maybe better. And, could you please kindly share DSDT and dmidecode to me? Plesae login by root then: % acpidump > acpidump.dat % dmidecode > dmidecode.log Thanks a lot! Joey Lee -- 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
