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 Post subject: The backlight changes itself on a nf310 with the voria PPA
PostPosted: 17/01/2011, 13:15 
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Joined: 17/01/2011, 13:08
Posts: 1
Hello

I'm using ubuntu 10.10 x86_64 on my samsung nf310 with the voria PPA. The backlight keys works, at least when using kernel 2.6.37 (the latest maverick kernel doesn't for some reason). When using the backligh keys I get tons of errors like this in dmesg:

[ 53.292926] ACPI: Failed to switch the brightness
[ 53.334817] ACPI: Failed to switch the brightness
[ 53.374770] ACPI: Failed to switch the brightness
[ 53.414178] ACPI: Failed to switch the brightness

But despite that the keys actually works so that's not a huge problem.

A problem is however that the backlight start changing itself once i a while. I get the same "Failed to switch..." messages in dmesg and the backligt goes up and down until I switch to a vt and back.

Do you have any ideas what could be causing this?


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 Post subject: Re: The backlight changes itself on a nf310 with the voria P
PostPosted: 20/01/2011, 8:09 
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Joined: 25/12/2010, 2:26
Posts: 3
You may try purging voria PPA to get back to stock packages and then:
1. Open /lib/udev/rules.d/95-keyboard-force-release.rules with your favorite text editor.
2. Go to line 22, which begins:
ENV{DMI_VENDOR}=="[sS][aA][mM][sS][uU][nN][gG]*"
3. The line contains a list of Samsung models. Near the end of the line, after *X460*, add the NF310, so the list ends like this: ...|*X460*|*NF310*"
DO NOT delete the stuff that's still at the end of the line (,RUN+=... and so on)
4. Reboot


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