[ have HP Victus with nvidia RTX 3050
After installing Zorin OS Max brightness is very low and slider is also working opposite , when 100% then brightness is low and When 0% brightness is High]
Please help; I really want to switch to Zorin.
You might try adding the grub parameter i915.invert_brightness=1
If you have not installed Zorin OS and are using LiveUSB, here is a quick guide on how to add a grub parameter on LiveUSB:
https://wiki.ubuntu.com/Kernel/KernelBootParameters
If you have installed Zorin OS, you can boot up as normal, then run
sudo nano /etc/default/grub
and add the parameter after quiet and splash as so:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.invert_brightness=1"
Once added, tap ctrl+o, then the enter key to overwrite and save changes, then the ctrl+x shortcut to exit the editor.
Now in terminal run,
sudo update-grub
Reboot and test.
The cause is due to the manufacturer including ACPI tables (values for the brightness interface) that conflict with the set ones in the kernel.
Not working
I want my max brightness issue to be resolved , Max brightness is very low. Brightness Slider is inverted i am okay with it .
Let's try a different tactic in case the fault is in the Gnome Extension.
Add the apandada1 repository:
sudo add-apt-repository ppa:apandada1/brightness-controller
Update and install Brightness Controller
sudo apt update && sudo apt install brightness-controller
Launch Brightness Controller from the app menu and test if it gives Greater Brightness and if it is inverted or not.
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okay So in Brightness Controller App Brightness slider is working fine i.e. not inverted but if i set brightness = max in App then to that is low as compared to Max brightness of windows
Thank you for your time. Please help me fix this max brightness issue. I am stuck in this issue from a long time
you can refer my detailed problem here -
This still sounds, then, like an ACPI issue.
Lets return to that...
sudo nano /etc/default/grub
Try the parameters:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux acpi_backlight=vendor"
Tap ctrl+o to overwrite, then the enter key to save the current configuration. Tap ctrl+x to exit the editor.
Now, you must run sudo update-grub for the changes to take effect.
Reboot
Test the brightness...
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The first AE errors are harmless and can be ignored. Or you can get rid of them by adding loglevel=3 parameter to the grub file.
The Caching errors can also be ignored or removed by modifying the /etc/modules file... I cannot remember off the top of my head the exact edit to make. I will need to look that up.
One more time... Let's try:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=video"
Then ctrl+o, enter, ctrl+x and sudo update-grub
Reboot - test Brightness.
IF that too fails... lets revert your grub to:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" or to
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash loglevel=3"
Be sure to sudo update-grub after.
This is one pernicious issue. No wonder it has been driving you crazy.
Doing a search I saw:
And I see you posted on the Manjaro forum having found someone else with the same issue.
This bug report has been submitted:
And you would do well to add your issue to it as more reports get more attention.
I tried all three methods above when i tried loglevel =3 it's stuck on boot logo and not booting into the system
That is very odd. All loglevel=3 does is reduce the warning messages to tier 3 or higher. It should not have any effect whatsoever on boot...
What about
What effect did it have?
1 Like
Not worked .
i tried recovery mode
Selected advance option and then selected recovery mode it boots up with full brightness And i am not able to low it down now. It's too much bright now
Please post the contents of or a screenshot of your Grub File.
Selecting "Recovery Mode" will send you to a Recovery Menu. This does not boot into the desktop.
Selecting Advanced Options... then selecting a different kernel will boot into the desktop.
Which of these two above did you do?
i did all the things you mentioned in desktop
When you selected Advanced Options for Zorin - what step did you do next?
Did you select the Recovery Menu or did you select to boot from a kernel?
