Last edited by DGINSD; July 6th, 2013 at 06:33 PM.
What I'm dealin' with:
HP Pavilion G6-1D60US, dual booted: Ubuntu 16.04 64bit, & Windows 7 Home Premium 64bit, 640 gig HDD, 4 gig RAM
I'm not so sure this is the same issue. The bug report refers to the system booting to a blank screen. The OP's problem is not the black screen, but inconsistent keyboard brightness control. In addition, according to the bug report, the kernel parameters "acpi_osi=Linux acpi_backlight=vendor" work around the problem, yet in this case, it totally eliminates the backlight interface. The symptoms are not the same.
EDIT: Also, the bug report is for an intel graphics-based G6. OP has an ATi card.
@DGINSD, just to confirm, do you have an issue with booting to a black screen?
Last edited by Toz; July 6th, 2013 at 06:57 PM.
@DGINSD,
Can you go back to the original kernel parameters? Then after reboot:
1. Open a terminal window and type in:
...then press the key combination to increase brightness once, and then the key combination to decrease brightness once. Post back whatever shows up in the terminal.Code:acpi_listen
2. Can you enter the following commands and post back whether they change the brightness:
Code:echo 7 | sudo tee /sys/class/backlight/acpi_video0/brightness echo 3 | sudo tee /sys/class/backlight/acpi_video0/brightness
I think your right I don't have the boot to dark screen and I just checked my 12.10 partition/install and it has the same dmesg
Incidentally on my 12.10 install the backlight controls work perfectly, so it's something that's changed with 13.04. Also I should mention after doing this install and noticing this issue, I found out there was a bios update available for my machine, I did the bios update but the issues still remained.Code:[Firmware Bug]: ACPI: No _BQC method, cannot determine initial brightness]
Last edited by DGINSD; July 6th, 2013 at 07:07 PM.
What I'm dealin' with:
HP Pavilion G6-1D60US, dual booted: Ubuntu 16.04 64bit, & Windows 7 Home Premium 64bit, 640 gig HDD, 4 gig RAM
Did you use the proprietary ATI drivers on the 12.10 install as well? Or the open source ones?
Good, that was a suggestion I was going to make.Also I should mention after doing this install and noticing this issue, I found out there was a bios update available for my machine, I did the bios update but the issues still remained.
Can you run the steps in my previous post regarding acpi_listen and manual brightness control and let me know the results?
Both installs are using manually installed FGLRX video drivers
The output of acpi_listen
The "video LCD 00000086 00000000, video LCD 00000087 00000000" entrys occurred when pressing the hotkeys, manual execution ofCode:david@HP-G6:~$ acpi_listenbattery BAT0 00000080 00000001 battery BAT0 00000081 00000001 video LCD 00000086 00000000 video LCD 00000087 00000000 battery BAT0 00000080 00000001 battery BAT0 00000081 00000001 battery BAT0 00000080 00000001 battery BAT0 00000081 00000001
in another bash session produced no output in the shell running acpi_listen, neither produced a change in backlight brightness.Code:david@HP-G6:~$ echo 3 | sudo tee /sys/class/backlight/acpi_video0/brightness 3 david@HP-G6:~$ echo 7 | sudo tee /sys/class/backlight/acpi_video0/brightness 7
Last edited by DGINSD; July 6th, 2013 at 08:26 PM.
What I'm dealin' with:
HP Pavilion G6-1D60US, dual booted: Ubuntu 16.04 64bit, & Windows 7 Home Premium 64bit, 640 gig HDD, 4 gig RAM
This is interesting. It should have changed brightness. Can you post back again:
...andCode:cat /proc/cmdline
Can you also try the following commands to see if they adjust brightness:Code:for i in /sys/class/backlight/*; do echo $i; cat $i/brightness; cat $i/max_brightness; done
If possible, can you check your 12.10 install and run the first two commands (don't run setpci) on that install for comparison purposes?Code:sudo setpci -s 00:01.0 f4.b=80 sudo setpci -s 00:01.0 f4.b=ff
Code:david@HP-G6:~$ cat /proc/cmdlineBOOT_IMAGE=/boot/vmlinuz-3.8.0-26-generic root=UUID=f0ff1ffc-ca4e-416a-b47d-a6b0c7c4bbf0 ro quiet splash vt.handoff=7The other two commands had no effect on the actual brightnessCode:david@HP-G6:~$ for i in /sys/class/backlight/*; do echo $i; cat $i/brightness; cat $i/max_brightness; done /sys/class/backlight/acpi_video0 2 10
Code:david@HP-G6:~$ sudo setpci -s 00:01.0 f4.b=80 david@HP-G6:~$ for i in /sys/class/backlight/*; do echo $i; cat $i/brightness; cat $i/max_brightness; done /sys/class/backlight/acpi_video0 2 10 david@HP-G6:~$ sudo setpci -s 00:01.0 f4.b=ff david@HP-G6:~$ for i in /sys/class/backlight/*; do echo $i; cat $i/brightness; cat $i/max_brightness; done /sys/class/backlight/acpi_video0 2 10
What I'm dealin' with:
HP Pavilion G6-1D60US, dual booted: Ubuntu 16.04 64bit, & Windows 7 Home Premium 64bit, 640 gig HDD, 4 gig RAM
Here is the output of those first two commands on my 12.04 install
Code:david@HP-G6:~$ cat /proc/cmdline BOOT_IMAGE=/boot/vmlinuz-3.5.0-34-generic root=UUID=124123b2-547f-45fa-bc5a-f90c094e444f ro quiet splashCode:david@HP-G6:~$ for i in /sys/class/backlight/*; do echo $i; cat $i/brightness; cat $i/max_brightness; done/sys/class/backlight/acpi_video0 3 10
What I'm dealin' with:
HP Pavilion G6-1D60US, dual booted: Ubuntu 16.04 64bit, & Windows 7 Home Premium 64bit, 640 gig HDD, 4 gig RAM
Can you now try with the acpi_backlight=vendor kernel parameter. After reboot, run:
...andCode:cat /proc/cmdline
Also, I don't have an ATI card. Is there a setting somewhere in the ATI driver that controls brightness? Maybe the proprietary driver is somehow interfering.Code:for i in /sys/class/backlight/*; do echo $i; cat $i/brightness; cat $i/max_brightness; done
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