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dpkg -l | grep linux-image
ii linux-image-3.14-0.bpo.2-amd64 3.14.15-2~bpo70+1 amd64 Linux 3.14 for 64-bit PCs
ii linux-image-3.16-0.bpo.2-amd64 3.16.3-2~bpo70+1 amd64 Linux 3.16 for 64-bit PCs
ii linux-image-amd64 3.16+61~bpo70+1 amd64 Linux for 64-bit PCs (meta-package)
it's good news because there is a lot of changes (if needed) - see here. but I have a problem with brightness. it doesn't work for my radeon hd6320 graphic card. is there any problem with acpi?
with older kernel (3.14) brightness data was set /sys/class/backlight/acpi_video0/actual_brightness. so
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:~$ cat /sys/class/backlight/acpi_video0/brightness
1
(brightness is set as 1%, 5% or less is quite enough).
interesting that /sys/class/backlight/directory has two subdirectories (links)
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~$ ls /sys/class/backlight/ -lh
total 0
lrwxrwxrwx 1 root root 0 Sep 28 17:32 acpi_video0 -> ../../devices/pci0000:00/0000:00:01.0/backlight/acpi_video0
lrwxrwxrwx 1 root root 0 Sep 28 17:33 radeon_bl0 -> ../../devices/pci0000:00/0000:00:01.0/drm/card0/card0-LVDS-1/radeon_bl0
with newer kernel one can try to change brightness either by mate preferences or manually but without any sign of changes. moreover there is no first acpi link.
I wonder if it works for different graphic cards. is it general problem or only for radeon? sb knows any solution for changing brightness? at the moment I'm working on older kernel (waiting for solution) since it's not essential for me to change it. but anyhow it's a little annoying.
cheers,