#Screen Permanently on 1 Brightness

1 messages · Page 1 of 1 (latest)

red tundra
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The original issue has been solved, and now I have 2 new issues.
My brightness is stuck at a low level, and the slider doesn’t change anything.
If I set scaling below 200%, the desktop zooms in too much and parts of it are cut off. If I set it at 200%, the cursor turns invisible until I restart.

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If you can't imagine, this is much more of a make-or-break issue than the poor sound quality I mentioned in a previous post, which I can kick down the road by using headphones.

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Improper Drivers (RTX 5060 Mobile)

rare tiger
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Which kernel version are you using?

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Also, please elaborate more on 'none of them work'

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Here's a list of commands i need output of:

uname -r, inxi -Fmxxxz, dmesg | grep nvidia

inland acorn
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and

mokutil --sb-state

please

rare tiger
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oh yeah secure boot must be off for proprietary modules to behave correctly

red tundra
red tundra
red tundra
rare tiger
red tundra
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I have no clue what half of it is, but I presume you do...

red tundra
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As for the third, literally nothing. The terminal just ignores it.

rare tiger
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Can you turn secure boot off, install a driver and reboot?

red tundra
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Installing an NVIDIA driver? On Linux? You're asking for a lot more than you think...

red tundra
inland acorn
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Use driver manager to get the driver, don't use one from nvidia site

red tundra
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That's the problem I've been having.

inland acorn
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what does

mokutil --sb-state

says?

red tundra
inland acorn
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It should say Secure boot enabled or disabled

red tundra
inland acorn
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hmm....

screenshot driver manager window

red tundra
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I tried all 3 and none work.

plvs_vltra.png
inland acorn
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Click 580-open, click apply, restart when asked, then show output of

inxi -Gxxx

red tundra
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580-open also darkens my screen, for some reason.

inland acorn
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Ok, driver is installed, but radeon card is used by default

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Go to nvidia settings - prime profiles and switch to performance

red tundra
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Or PorwerMizer? There's a similar setting to what you said there.

inland acorn
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Screenshot the nvidia settings window

red tundra
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I think this is what you mean.

plvs_vltra.png
inland acorn
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no. What does

dpkg -l | grep prime

say?

red tundra
inland acorn
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ok, then

prime-select query

red tundra
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"on-demand".

inland acorn
red tundra
inland acorn
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ok, then try

sudo prime-select nvidia

red tundra
inland acorn
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ok, restart and show us

inxi -Gxxx

again

red tundra
inland acorn
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Ok, should be using nvidia now

red tundra
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Time to test that in-game.

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Uh, I got another problem, suddenly...

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On anything lower than 200% monitor scale, the screen becomes too large for itself.

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And, on 200%, the cursor becomes invisible.

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Whatever, I'm booting up a GPU-intensive game to see if the main issue works.

inland acorn
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You should have brightness slider

red tundra
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Does nothing anymore, at all.

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Before we try to fix that, though, I'm booting up a game to see if the GPU works now.

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It works!

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Thank you so much....

red tundra
red tundra
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Screen Permanently Dark and Scale Issues

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New main issue at hand.

rare tiger
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this feels more of an nvidia issue

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can you try the 570 driver?

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from the driver manager ofc

red tundra
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I doubt it'll work, but no harm in trying (I hope).

rare tiger
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580 seems like a fucked up release

red tundra
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-# If this unfixes the GPU issues and I have to do everything again, I might bite the bullet and dual-boot with Windows.

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Regardless, I'm switching to 570 for a second.

red tundra
# rare tiger can you try the 570 driver?

It fixed the scale issue, but not the brightness issue.
-# And I don't have time to go in-game to check if the GPU still works properly. I'm going to the doctor for a check-up soon.

rare tiger
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brightness might be an ACPI thing

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Can you post output of dmesg -l warn+ | grep ACPI?

red tundra
rare tiger
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doesn't seem like it

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is wifi working?

red tundra
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Well, I'm talking to you on my laptop, so I'm going to say yes.

rare tiger
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Can you switch back to the Radeon GPU?

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From the prime applet

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then check if brightness works

red tundra
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I booted up a game and it seems to work still.

red tundra
rare tiger
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the little nvidia icon on the taskbar

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icons like the battery, sound, etc. are called 'applets'

red tundra
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Well, I have to go now. I'll do that when I get back.

rare tiger
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ok

red tundra
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Goodbye for an hour, or maybe 2.

rare tiger
inland acorn
red tundra
red tundra
rare tiger
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well, birghtness is largely controlled by the DRM driver

red tundra
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What do I do, then?

rare tiger
red tundra
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I can live with that, honestly.

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But if we can fix it, that'd still be nice.

rare tiger
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what does glxinfo | grep -E "OpenGL renderer" say?

red tundra
rare tiger
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do fn+brightness [up/down] do anything?

red tundra
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No.

rare tiger
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output of lsmod | grep wmi ?

rare tiger
red tundra
rare tiger
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okay atleast the Fn keys work

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can you boot the 6.8 kernel?

red tundra
red tundra
red tundra
rare tiger
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did backlight work prior to installing the nvidia driver?

red tundra
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My laptop monitor is OLED, so it doesn't have backlighting.

rare tiger
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hmm..

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this laptop may be too modern for mint

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wait

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wait

red tundra
red tundra
rare tiger
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log out, select the mountain icon, click on 'Cinnamon on Wayland' and log in

red tundra
rare tiger
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does it work?

red tundra
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No.

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Screen Permanently on 1 Brightness

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-# Latter issue is solved, it's just the permanent brightness I need to fix.

red tundra
# red tundra No.

Also, I feel like this increased visual noise and increased cursor sensitivity, oddly enough.

rare tiger
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ok go back

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do the same thing as before but select 'Cinnamon (default)'

red tundra
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-# They said Linux Mint just works... they lied. sadMinty

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Welp, I'm back, and the visual noise is gone.

rare tiger
red tundra
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I figured.

rare tiger
red tundra
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It's a lot...

rare tiger
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it is supposed to be a lot

red tundra
rare tiger
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@gilded flicker help :(

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[  1537.173] (WW) NVIDIA(G0): ACPI: failed to determine the system's current power source
[  1537.173] (II) NVIDIA(G0): ACPI: failed to connect to the ACPI event daemon; the daemon
[  1537.173] (II) NVIDIA(G0):     may not be running or the "AcpidSocketPath" X
[  1537.173] (II) NVIDIA(G0):     configuration option may not be set correctly.  When the
[  1537.173] (II) NVIDIA(G0):     ACPI event daemon is available, the NVIDIA X driver will
[  1537.173] (II) NVIDIA(G0):     try to use it to receive ACPI event notifications.  For
[  1537.173] (II) NVIDIA(G0):     details, please see the "ConnectToAcpid" and
[  1537.173] (II) NVIDIA(G0):     "AcpidSocketPath" X configuration options in Appendix B: X
[  1537.173] (II) NVIDIA(G0):     Config Options in the README.

This may be something??

gilded flicker
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the zoom issue?

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for brightness, use xrandr

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see #1430719682779942973 message

rare tiger
rare tiger
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you mean setting a specific value using xrandr?

gilded flicker
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the hardware one yes. see the link.

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sometimes the hw one isnt compatible on linux

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Pop a terminal open and check this plz:
xrandr --query | grep " connected"
what's it result?

TaeOP — 22/10/2025, 21:05
eDP-1 connected primary 2560x1600+0+0 (normal left inverted right x axis y axis) 344mm x 215mm

Stunner_619 — 22/10/2025, 21:06
does screen seem too bright or too dim right now?

TaeOP —22/10/2025, 21:06
bright

Stunner_619 — 22/10/2025, 21:06
do xrandr --output eDP-1 --brightness 0.7

red tundra
gilded flicker
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it's just old

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click it. i already quoted it. the full link is how to make scripts

red tundra
red tundra
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Welp, I decided to put this issue off, and now I'm paying the price by having everyone else do so too.

gilded flicker
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eg: first do this command in the terminal: #1430719682779942973 message

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and ensure that it actually did something, like alter the brightness.

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if it did, follow the rest of the chat there.

red tundra
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But putting in a higher value like 1.5 doesn't do what I'd expect it to.

gilded flicker
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range is 0 to 1

red tundra
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I'm not sure what way to describe it, it's making the image brighter in the sense that someone went into photoshop and put a brighness filter.

gilded flicker
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don't put so low that you're blinded with black screen forever

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i see. well something else is at play

red tundra
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I feel I should remind you that my screen is an OLED.

gilded flicker
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there's some linux startup parameter that I vaguely remember

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something like acpi-backlight=0 (or 1) i cant remember

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those are put in during GRUB at boot to test. (by pressing e)

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then editing the 2nd-last line

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they are temporary parameters, but can later be made permanent

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I would google your issue, using key words like your pc model number + the nature of the problem

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others may have reported a same issue or found fix

red tundra
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If I'm reading this right, then the issue is disabling the AMD GPU.

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What command should I use to enable it? Or, better yet, can I do it without the terminal?

gilded flicker
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well, if u have more than one GPU, otherwise forget it

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inxi -Gx

red tundra
gilded flicker
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ok. u do indeed

red tundra
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The CPU's integrated graphics are what I meant by "AMD GPU".

gilded flicker
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idk if your BIOS will have an option to turn off the AMD onboard gpu

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u can check.

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else, it would have to be some startup param' put into grub. not sure what

red tundra
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I noticed that the startup animation and subsequent Mint logo have the correct brightness.

gilded flicker
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k

red tundra
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I reset the bios to default, and now it's stuck at max brightness instead.

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Back to low brightness after returning to the bios and disabling the audio on startup (ROG laptops have a sound effect with their startup animation).

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@gilded flicker any ideas?

red tundra
gilded flicker
red tundra
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Wait...

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The problem was fixed entirely. The F7/8 keys change the brightness properly again.

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I sure hope that the issue wasn't Secure Boot being off because, like I just said, I take it that's something I need disabled.

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Let me just boot up a game to see if that didn't un-fix the GPU.

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Yeah, no, that un-fixed the GPU.

gilded flicker
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u can still register nvidia driver with secure boot on, then it'll work

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then again, maybe the nvidia thing causes the brightness issue 😛

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see #1295728709306683482 INDEX , section 3 for nvidia setup

red tundra
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Brightness controls work again.

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Let me see if the GPU still does.

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Nope.

gilded flicker
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did u register the nvidia driver as the manual says? (when SB is on)

red tundra
red tundra
red tundra
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Closing: It seems to have indeed been an issue with my computer being too new (for Debian-based distros), as someone pointed out. I'm on CachyOS now.