mactel-support team mailing list archive

[Mario Schwalbe <schwalbe@xxxxxxxxxxxxxxxxx>]

Could you please report bugs, after testing by invoking the driver
directly? Otherwise there are a lot of other possible error sources
involved, including hal itself, which is deprecated and possibly not
present in lucid anymore. (So lucid users should expect problems.)

You can do so by running:

$ sudo rmmod nvidia_bl
$ sudo modprobe nvidia_bl debug=1
$ cat /sys/module/nvidia_bl/parameters/*
$ echo <some value between 0 and 1023> | sudo tee /sys/class/backlight/nvidia_backlight/brightness

and observe the messages in /var/log/kern.log. I'm asking, because the
changes in 0.16.1 compared to 0.15.4 shouldn't affect the MacBook Pros,
but only add support for Dell and Sony machines. Attached the diff if
someone might want to have a look.


** Patch added: "nvidia_bl-0.15.4-0.16.1.c.diff"
   http://launchpadlibrarian.net/40954595/nvidia_bl-0.15.4-0.16.1.c.diff

-- 
nvidia-bl-dkms 0.16.1 breaks screen brightness (backlight) adjustment on MacBook 5.1 [Karmic]
https://bugs.launchpad.net/bugs/538326
You received this bug notification because you are a member of Mactel
Support, which is the registrant for Mactel Support.

Status in Mactel Support: New

Bug description:
On my MacBook 5.1, upon updating to nvidia-bl-dkms 0.16.1~karmic, the brightness controls fail to have physical effect on the brightness of the screen. The screen brightness remains at 100% brightness.

Pressing the brightness keys brings up the brightness indicator in the notifications area, and cause the brightness bar to move up or down very slowly (see Bug #357112), however this has no effect on physical brightness. Similarly, using the slider under System -> Preferences -> Power Management has no effect on physical brightness.

This is a severe regression. The 0.15 series was annoyingly slow to respond, but this new series doesn't respond at all.