Hi Forum - I updated to Zorin 18.1 Pro and now the brightness is set to very dim and the slider stopped working. I attempt several fixes as outlined in a 2021 post here but nothing worked. Thanks to anyone!
Hi and welcome to the forum.
I assume you have used the Zorin Upgrader tool to go from Z17 to Z18.1 Pro? Or was this just a point update from Z18 to Z18.1?
There are a number of "brightness issue" threads from 2021. So that we can understand what you have tried, can you post a link to the specific 2021 thread you used. Thanks.
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Which kernel are you running (the command uname -r shows it)? Today was reported from a user that the kernel 7.0 caused the problem with low screen brightness and kernel 6.17 has worked before. You could test if it is better when you boot from a 6.17 kernel or an older one. At advanced options for Zorin in grub menu you can select an older kernel for the next boot to test it.
I am running 7.0. The brightness was not an issue until an update today. I upgraded to pro hoping to fix this but it didn't. I will attempt to boot with the 6.17 Kernel.
Thanks! It was from "noketti" August 2021.
Oh I used the upgrader tool to buy the upgrade to 18.1
I booted using 6.17 Kernel. No change. And the brightness controller/slider is missing. Not in the tray, F keys do nothing, nothing in settings.
Welcome to the Forum!
Only to be clear for me: You mean the Brightness of the Display or the Brightness of Key Backlights?
This is all the display brightness. The F4 (HP Envy) key backlights work fine. F2-F3 do nothing. There was a slider popup before the udpate, now that is gone.
Thanks! Eveyone is so generous. All new to me, but good up to today after a few months.
You could try it with the
acpi_backlight=native kernel parameter:
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Okay, maybe a Gnome Extension could help. I took a quick Look and for Zorin 18, I found 2 that You could try. But please one at a Time. Don't activate both together to avoid Issues.
For the last one, You need to install a Package called ddcutil because it lays on it. You can install it with the Command sudo apt install ddcutil via Terminal. When You look at the Link in the Comments, You will see someone who mentioned that it works on Zorin 18.1. So, maybe try this first.
To install a gnome Extension, open gnome Software and look for the Extension Manager and install it:
When installed, open it and go to the ''Browsed Tab'' and search for the Extension. then click on the Install Button. Then go to the ''Installed'' Tab where You can set it up.
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I did modify that line with acpi_backlight=native - nothing.
Thank you. I will try this in a few.
What is your GPU ?
Intel
Try to be more accurate !
You can use
sudo lshw -C video
to narrow that down.
Or use Inxi:
sudo apt install inxi
Then
inxi -G
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lspci -nnk | grep -iA3 vga
00:02.0 VGA compatible controller [0300]: Intel Corporation Raptor Lake-U [Intel Graphics] [8086:a7ac] (rev 04)
Subsystem: Hewlett-Packard Company Raptor Lake-U [Intel Graphics] [103c:8cba]
Kernel driver in use: i915
Kernel modules: i915, xe
Try this
sudo nano /etc/default/grub
add to GRUB_CMDLINE_LINUX_DEFAULT
i915.enable_dpcd_backlight=3
Then:
sudo update-grub
sudo reboot
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HP ZBook 15 G6, Zorin OS 18.1 Pro, BIOS R92 01.32.00. Since a recent update: random shutdowns, brightness stuck (slider/Fn keys do nothing), and internal display stays black after suspend (HDMI still works).
Tried: acpi_backlight=native, acpi_osi=Linux, i915.enable_dpcd_backlight=3, switched prime-select to on-demand, added resume xrandr script with retries. Confirmed kernel-level: writing directly to /sys/class/backlight/intel_backlight/brightness (0-1023) has zero visible effect on the panel.
System logs show ACPI BIOS errors (AE_AML_PACKAGE_LIMIT) aborting _TZ.GETP thermal methods. Suspect broken ACPI firmware table. Anyone seen this on ZBook G6 specifically, or found a fix beyond a BIOS flash?