Brightness 0 on Boot

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Brightness 0 on Boot

Postby icmp_request on Mon May 12, 2014 4:01 pm

Hello! :)

Just wondering if you have a fix. My Laptop Screen Brightness goes to 0 when booting into LMDE and I have to manually turn it up.

I have searched here and there and found a quick fix, to add this line into rc.local:

Code: Select all
cat /sys/class/backlight/acpi_video0/max_brightness > /sys/class/backlight/acpi_video0/brightness


But it doesn't work all of the time and it works... well, only when rc.local runs, after all the scripts, so no boot messages for me.

I have also tried to give the "nomodeset" (without the quotes) parameter for my linux kernel on boot which worked on another distro, and it kinda solved, if it were not for the fact that X wouldn't start anymore.

Ah, my hardware details:

Video: Intel® HD Graphics 4000 from Core i3-3110M.

(By the way, where did the "hwinfo" command go? Can't find it anywhere. Is it on another package or should I download the .deb from somewhere and install manually? Sorry, old Linux Mint LTS user, newcomer to LMDE...)
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Re: Brightness 0 on Boot

Postby icmp_request on Wed May 14, 2014 5:56 am

The issue was solved by adding:

Code: Select all
acpi_osi=Linux


To the kernel boot options. Any other option like acpi_vendor=something didn't have any effect for me.


I'm still wondering about the "hwinfo", though:

1. Was this removed? If so, which would be a good replacement?
2. Is it available only by adding the Debian Testing repository to my apt sources?
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Re: Brightness 0 on Boot

Postby austin.texas on Wed May 14, 2014 9:29 am

icmp_request wrote:I'm still wondering about the "hwinfo", though:
1. Was this removed? If so, which would be a good replacement?

Using Mint 13 Cinnamon, I had hwinfo in the repository. Now with Mint 16 Cinnamon, it is no longer there. It may be the same situation for LMDE.
There is a very nice GUI program in the repo - hardinfo
See if you have that.
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Re: Brightness 0 on Boot

Postby Monsta on Wed May 14, 2014 9:53 am

icmp_request wrote:I'm still wondering about the "hwinfo", though:

1. Was this removed? If so, which would be a good replacement?
2. Is it available only by adding the Debian Testing repository to my apt sources?

It's been removed from Debian Testing repos some time before UP8 freeze (see this page), and so it's currently not present in LMDE repos. Later it's been added to Debian Testing repos again, and that's where you can get it from.
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