Re: Bug#703134: base: Screen brightness dim on a Dell XPS M1710; can't change it
reassign 703134 src:linux
severity 703134 normal
thanks
On Freitag, 15. März 2013, Damien wrote:
> Package: base
> Severity: important
>
> Dear Maintainer,
>
> I've been unable to change the screen brightness today, on a Dell XPS M1710
> laptop. It stays dim. When changing from a virtual terminal to X, the
> screen is bright briefly, but immediately dims again. During boot, the
> brightness is correct for Grub but dims during the boot process.
>
> If I use the brightness keys to set the brighness to the minimum value, the
> screen doesn't brighten when I change to the graphical desktop from a text
> console (ie. ctrl+alt+f1), but when I set it to maximum it becomes bright
> for about 1/4 second when I change to the graphical desktop.
>
> The brightness keys don't work, nor does writing to
> /sys/class/backlight/acpi_video0/backlight.
>
> I've only seen this today, so maybe it's related to these package updates:
>
> Start-Date: 2013-03-15 17:02:14
> Upgrade: xserver-xorg-video-ati:amd64 (6.14.4-7, 6.14.4-8),
> gstreamer0.10-alsa:a md64 (0.10.36-1, 0.10.36-1.1),
> linux-image-3.2.0-4-amd64:amd64 (3.2.35-2, 3.2.39 -2),
> linux-headers-3.2.0-4-amd64:amd64 (3.2.35-2, 3.2.39-2),
> linux-headers-3.2.0 -4-common:amd64 (3.2.35-2, 3.2.39-2),
> libgstreamer-plugins-base0.10-0:amd64 (0.1 0.36-1, 0.10.36-1.1),
> linux-libc-dev:amd64 (3.2.35-2, 3.2.39-2), xserver-xorg-vi
> deo-radeon:amd64 (6.14.4-7, 6.14.4-8), gstreamer0.10-plugins-base:amd64
> (0.10.36 -1, 0.10.36-1.1)
> End-Date: 2013-03-15 17:03:02
>
> I don't know whether the brightness controls worked before as the screen
> was always bright enough.
>
> I think this is the relevant part of 'lshw':
>
> *-display
> description: VGA compatible controller
> product: G71 [GeForce Go 7950 GTX]
> vendor: NVIDIA Corporation
> physical id: 0
> bus info: pci@0000:01:00.0
> version: a1
> width: 64 bits
> clock: 33MHz
> capabilities: pm msi pciexpress vga_controller bus_master
> cap_list rom configuration: driver=nouveau latency=0
> resources: irq:16 memory:ed000000-edffffff
> memory:d0000000-dfffffff memory:ee000000-eeffffff ioport:ef00(size=128)
> memory:efe00000-efe1ffff
>
> Let me know if you need any more information.
>
> -- System Information:
> Debian Release: 7.0
> APT prefers testing
> APT policy: (500, 'testing')
> Architecture: amd64 (x86_64)
>
> Kernel: Linux 3.2.0-4-amd64 (SMP w/2 CPU cores)
> Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash
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