Screen Dim Causes A Buzz

bsilvereagle · 2011-03-31 01:12:42

Currently the only way I can adjust screen brightness on my F11 (Nvidia GT330m) is by manually changing the value of the file /sys/devices/virtual/backlight/acpi_video0/backlight. When I do, I recieve a buzz. I had the same issue in openSuse 11.3 but when I switched to 11.4 the issue was resolved. I do not get a buzz in Windows 7. All OSes are 64-bit.
Kernel: 2.6.37

stqn · 2011-03-31 08:59:09

Do you mean the screen makes a buzzing noise?
All my LCD screens make such a noise, except when they are at their maximum luminosity.

bsilvereagle · 2011-03-31 12:37:20

Yes, the screen.
But it doesn't happen in Win7 or openSuse 11.4. And as far as I can tell, 11.4 and my Arch Install have the same kernel.

bsilvereagle · 2011-04-10 00:52:57

After following the steps here https://bbs.archlinux.org/viewtopic.php?pid=812490 the buzz has disappeared from the terminal and only happens when X is active.
However, things got more interesting. "startx" results in a black screen if I have set /sys/devices/virtual/backlight/acpi_video0/brightness to anything less than full brightness and a switch to a tty results in the tty flashing and then a black screen.

Last edited by bsilvereagle (2011-04-10 00:54:26)

Arch Linux

#1 2011-03-31 01:12:42

Screen Dim Causes A Buzz

#2 2011-03-31 08:59:09

Re: Screen Dim Causes A Buzz

#3 2011-03-31 12:37:20

Re: Screen Dim Causes A Buzz

#4 2011-04-10 00:52:57

Re: Screen Dim Causes A Buzz

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