hardy changes screen brightness to max

[Rocko]

In Hardy Alpha 4 on my Inspiron 8600 with an ATI 9600 Radeon Mobility card, the PC periodically resets screen brightness to max without me doing anything.

It seems to do it twice in a row, because if I use the hot-key combination to change it back, it quickly resets back to max, but if I adjust it again, it stays where I put it (for some minutes, anyway, until the next periodic adjustment).

It has been doing this both with the default radeon and fglrx (8.45) drivers.

[Rocko (rockorequin)]

It also does this consistently at reboot.

The application at fault might be hald-addon-dell - this jumps to the second highest process on the list of processes (under dbus-daemon) when I run the 'top' command and then continually the change screen brightness manually.

kondemand, hald, and console-kit-daemon also figure high in the list when I do this.

[Islam Badrel-Dein (islambadreldein)]

I can confirm this.

Ubuntu Hardy Alpha4
Linux version 2.6.24-8-generic (buildd@yellow) (gcc version 4.2.3 (Ubuntu 4.2.3-1ubuntu2)) #1 SMP Thu Feb 14 20:13:27 UTC 2008

on

Acer Extensa 5620
Mobile Intel Graphics Media Accelerator X3100

I also want to add that the Manual Brightness Changing is behaving strangely. First, I incremented the brightness to Max. This is OK. Then I start to decrement the brightness step by step. However, the brightness jumps from the assumed level to Max and then back to normal level and then to Max. I mean, for odd numbered clicks it jumps to Max; while for even numbered clicks it is behaving normally!

[Mikael Nilsson (mini)]

Confirmed, though for me, it changes brightness to medium regularly. Manual brightness control is very jumpy.

[Mikael Nilsson (mini)]

I have a Dell XPS M1710 laptop.

[Kevin Oberle (kevin.oberle)]

Confirmed on an Acer Aspire 3613WLMi. Although the brightness doesn't go to max, it just increments upwards at what appear to be random intervals.

[Rocko (rockorequin)]

For a while between alpha 5 and 6 this problem changed for me so that it was only occurring when starting X (ie logon or resume), but now the random jumps to maximum brightness are back. (It is also resetting to max at login or resume.)

[Rocko (rockorequin)]

After today's updates, the screen no longer resets to max upon starting X.

HOWEVER, now when I press the FN-down arrow key to reduce screen brightness, my keyboard stops functioning for anything other than reducing or increasing screen brightness.

[Rocko (rockorequin)]

I reinstalled from Hardy beta and I no longer have this auto-brightness-adjustment problem.

[Stefano Marinelli (draga-dragas-it)]

Same situation here, with the screen periodically jumping up in brightness.
More, when scaling it down, it gets max and then becomes darker until I reach the top down.
Acer Aspire A5715Z, Hardy AMD64

[tomoyuki28jp (tomoyuki28jp)]

I use thinkpad X300 and still have the same problem.

Every time I boot my Ubuntu Hardy, the brightness set to the max.

[Jan Celis (jancelis)]

Confirmed on HP Compaq 6710b
VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c)
Linux version 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686 GNU/Linux

Brightness jumps occur more when running on battery power.

[Tom Adams (holizz)]

This doesn't appear to happen in natty. Closing.