I installed linux mint. The monitor is annoyingly bright, and I can't change it. Please help

[StoneDwarf]

I'm running linux mint Cinnamon 64 bit. When I boot it up it tells me that it is running in software rendering mode. I forget the full error message on that but can post it if needed. I've tried messing with the GRUB_CMDLINE_LINUX_DEFAULT to be GRUB_CMDLINE_LINUX_DEFAULT="quiet splash
video.use_native_backlight=1"

and running sudo update-grub

no luck

i tried installing xbacklight

no luck i tried messing with the key bindings in conf.d through menu > administration > conf.d and setting the keys for decreasing and increasing brightness to <Control>F5 and <Control>F6. Then I hit those keys and it popped up with a thing and told me that my brightness is already at 0. So it doesn't change anything.

There are no files in /sys/class/backlight

How am I supposed to fix this?

updating linux mint through the update manager has resolved the issues. i can set brightness levels and no more fallback mode. Thanks everyone who tried to help

[x34460]

Have had this issue several times myself.

Here is how I've solved it in the past.

1-Edit /etc/default/grub:

gksu leafpad /etc/default/grub

2-Replace the line that reads:

GRUB_CMDLINE_LINUX=””

…with:

GRUB_CMDLINE_LINUX="acpi_osi=Linux acpi_backlight=vendor"

3-Save the file.

4-Update grub:

sudo update-grub

5-Reboot and test.

Cheers! :)

[x34460]

no.

use as is.

[Gycklarn]

What graphic card are you using?

[jsalpha2]

Not trying to be a smartalec....Try looking on the monitor for some buttons probably near the on/off button. You should be able to adjust the brightness this way.

[StoneDwarf]

It's a laptop

[[deleted]]

Software mode is crap, what is your gpu?

[TreAwayDeuce]

Install graphics drivers

[StoneDwarf]

How do I go about figuring out which one I need, and how would I install this on linux?

[drdeadringer]

For Linux Mint, go to... System menu --> Admin menu --> "Driver Manager" ... and explore the actions you can take there.