[SOLVED]unable to decrease my brightness

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Entropy Boltzmann
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[SOLVED]unable to decrease my brightness

Post by Entropy Boltzmann »

i've installed mint 20.2 cinnamon on my thinkpad and i'm facing problems regarding the brightness. i'm not able to use the brightness hotkeys nor change the brightness manually in the power management so i tried some tutorials and fixes. the brightnessctl method didn't work and all these methods seems to be for intel/nvidia graphics card but i've a amd radeon graphics card. what do i do now ? its eating my battery and i'm not able to find help anywhere. and also is there a way to regain the functions of the hotkeys ?
edit : didn't include the config so here it is
System: Kernel: 5.4.0-91-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 Desktop: Cinnamon 5.0.7
m: muffin dm: LightDM Distro: Linux Mint 20.2 Uma base: Ubuntu 20.04 focal
Machine: Type: Laptop System: LENOVO product: 20T6S0UQ00 v: ThinkPad E14 Gen 2 serial: <filter>
Chassis: type: 10 serial: <filter>
Mobo: LENOVO model: 20T6S0UQ00 serial: <filter> UEFI: LENOVO v: R1AET37W (1.13 )
date: 04/09/2021
Battery: ID-1: BAT0 charge: 38.2 Wh condition: 38.2/45.0 Wh (85%) volts: 12.5/11.3
model: Celxpert 5B10X026 serial: <filter> status: Discharging
CPU: Topology: 6-Core model: AMD Ryzen 5 PRO 4650U with Radeon Graphics bits: 64
type: MT MCP arch: Zen rev: 1 L2 cache: 3072 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm bogomips: 50304
Speed: 1397 MHz min/max: 1400/2100 MHz Core speeds (MHz): 1: 1397 2: 1397 3: 1383
4: 1383 5: 1398 6: 1397 7: 1397 8: 1397 9: 1383 10: 1388 11: 2420 12: 2420
Graphics: Device-1: AMD Renoir vendor: Lenovo driver: N/A bus ID: 04:00.0 chip ID: 1002:1636
Display: x11 server: X.Org 1.20.11 driver: ati,fbdev unloaded: modesetting,radeon,vesa
resolution: 1920x1080~77Hz
OpenGL: renderer: llvmpipe (LLVM 12.0.0 256 bits) v: 4.5 Mesa 21.0.3 compat-v: 3.1
direct render: Yes
Last edited by LockBot on Wed Dec 28, 2022 7:16 am, edited 3 times in total.
Reason: Topic automatically closed 6 months after creation. New replies are no longer allowed.
Obsolet
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Re: unable to decrease my brightness

Post by Obsolet »

Same problem here. Are you running from USB stick (Live Linux) or full install? For installed Linux the editing of the GRUB file seems to be the right approach.
My HP Elitebook 845 G3 loades Acpi-Video0 but it should be Radeon I guess since the laptop has an AMD APU (AMD Ryzen 7 PRO 5850U with Radeon Graphics × 8)
I still were not able to fix it for my Live Linux though. Maybe, if one day, I can share it
Hoser Rob
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Re: unable to decrease my brightness

Post by Hoser Rob »

Obsolet wrote: Sun Dec 05, 2021 10:35 am Same problem here. Are you running from USB stick (Live Linux) or full install? For installed Linux the editing of the GRUB file seems to be the right approach.
My HP Elitebook 845 G3 loades Acpi-Video0 but it should be Radeon I guess since the laptop has an AMD APU (AMD Ryzen 7 PRO 5850U with Radeon Graphics × 8)
I still were not able to fix it for my Live Linux though. Maybe, if one day, I can share it
Actually, since the OP has not posted system info other than the make/model, you do not know if the OP has the same problem or not. You certainly don't know if modifying grub is the right approach.

To the OP: post sime useful info, copy/paste the text output of inxi -Fxxxrz run in the terminal.
For every complex problem there is an answer that is clear, simple, and wrong - H. L. Mencken
Obsolet
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Re: unable to decrease my brightness

Post by Obsolet »

Actually what the OP wrote sounds quite like the same many Linux user (me included) have, which is, that brightness can't be controlled, although the brightness slider is there and/or the hotkeys are idicating that brightness level is altered. The screen itself, the hardware, does not dim or bright up though.
But well, yes, let the OP feed the threat with more input and then let us see. I am still guessing I wasn't that wrong
Entropy Boltzmann
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Re: unable to decrease my brightness

Post by Entropy Boltzmann »

Hoser Rob wrote: Sun Dec 05, 2021 10:56 am
Obsolet wrote: Sun Dec 05, 2021 10:35 am Same problem here. Are you running from USB stick (Live Linux) or full install? For installed Linux the editing of the GRUB file seems to be the right approach.
My HP Elitebook 845 G3 loades Acpi-Video0 but it should be Radeon I guess since the laptop has an AMD APU (AMD Ryzen 7 PRO 5850U with Radeon Graphics × 8)
I still were not able to fix it for my Live Linux though. Maybe, if one day, I can share it
Actually, since the OP has not posted system info other than the make/model, you do not know if the OP has the same problem or not. You certainly don't know if modifying grub is the right approach.

To the OP: post sime useful info, copy/paste the text output of inxi -Fxxxrz run in the terminal.
System:
Kernel: 5.4.0-91-generic x86_64 bits: 64 compiler: gcc v: 9.3.0
Desktop: Cinnamon 5.0.7 wm: muffin 5.0.2 dm: LightDM 1.30.0
Distro: Linux Mint 20.2 Uma base: Ubuntu 20.04 focal
Machine:
Type: Laptop System: LENOVO product: 20T6S0UQ00 v: ThinkPad E14 Gen 2
serial: <filter> Chassis: type: 10 serial: <filter>
Mobo: LENOVO model: 20T6S0UQ00 serial: <filter> UEFI: LENOVO
v: R1AET37W (1.13 ) date: 04/09/2021
Battery:
ID-1: BAT0 charge: 37.0 Wh condition: 38.2/45.0 Wh (85%) volts: 12.3/11.3
model: Celxpert 5B10X026 type: Li-poly serial: <filter>
status: Discharging cycles: 229
CPU:
Topology: 6-Core model: AMD Ryzen 5 PRO 4650U with Radeon Graphics
bits: 64 type: MT MCP arch: Zen rev: 1 L2 cache: 3072 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm
bogomips: 50304
Speed: 1396 MHz min/max: 1400/2100 MHz boost: enabled Core speeds (MHz):
1: 1397 2: 1390 3: 1394 4: 1396 5: 1397 6: 1396 7: 1394 8: 1396 9: 1397
10: 1397 11: 1397 12: 1400
Graphics:
Device-1: AMD Renoir vendor: Lenovo driver: N/A bus ID: 04:00.0
chip ID: 1002:1636
Display: x11 server: X.Org 1.20.11 driver: ati,fbdev
unloaded: modesetting,radeon,vesa resolution: 1920x1080~77Hz
OpenGL: renderer: llvmpipe (LLVM 12.0.0 256 bits) v: 4.5 Mesa 21.0.3
compat-v: 3.1 direct render: Yes
and also i wanted to say thank you for trying to help me.... this issue as been bugging me for days now
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SMG
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Re: unable to decrease my brightness

Post by SMG »

Entropy Boltzmann wrote: Sun Dec 12, 2021 3:16 pmand also i wanted to say thank you for trying to help me.... this issue as been bugging me for days now
Please upgrade your kernel. Your system is running without a graphics driver.

Graphics:
Device-1: AMD Renoir vendor: Lenovo driver: N/A bus ID: 04:00.0
chip ID: 1002:1636
Display: x11 server: X.Org 1.20.11 driver: ati,fbdev
unloaded: modesetting,radeon,vesa resolution: 1920x1080~77Hz
OpenGL: renderer: llvmpipe (LLVM 12.0.0 256 bits) v: 4.5 Mesa 21.0.3
compat-v: 3.1 direct render: Yes

Instructions for upgrading to the 5.13 kernel:
  • Open Update Manager.
  • Select View > Linux Kernels and click Continue.
  • Make sure 5.13 is selected on the left panel and then click the top-most option on the right panel. An "Install" button will appear.
  • Install the kernel and then reboot for it to become active.
See if you are able to control brightness after the graphics driver loads.
Image
A woman typing on a laptop with LM20.3 Cinnamon.
Entropy Boltzmann
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Re: unable to decrease my brightness

Post by Entropy Boltzmann »

Obsolet wrote: Sun Dec 05, 2021 6:37 pm Actually what the OP wrote sounds quite like the same many Linux user (me included) have, which is, that brightness can't be controlled, although the brightness slider is there and/or the hotkeys are idicating that brightness level is altered. The screen itself, the hardware, does not dim or bright up though.
But well, yes, let the OP feed the threat with more input and then let us see. I am still guessing I wasn't that wrong
yeah you're right, its the same issue with me and i have only seen fixes for intel_backlight and nothing useful for acpi_video0. i also tried reading the arch wiki for acpi but didn't finish it because it was just to much. thanks in advance
Entropy Boltzmann
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Re: unable to decrease my brightness

Post by Entropy Boltzmann »

SMG wrote: Sun Dec 12, 2021 3:20 pm
Entropy Boltzmann wrote: Sun Dec 12, 2021 3:16 pmand also i wanted to say thank you for trying to help me.... this issue as been bugging me for days now
Please upgrade your kernel. Your system is running without a graphics driver.

Graphics:
Device-1: AMD Renoir vendor: Lenovo driver: N/A bus ID: 04:00.0
chip ID: 1002:1636
Display: x11 server: X.Org 1.20.11 driver: ati,fbdev
unloaded: modesetting,radeon,vesa resolution: 1920x1080~77Hz
OpenGL: renderer: llvmpipe (LLVM 12.0.0 256 bits) v: 4.5 Mesa 21.0.3
compat-v: 3.1 direct render: Yes

Instructions for upgrading to the 5.13 kernel:
  • Open Update Manager.
  • Select View > Linux Kernels and click Continue.
  • Make sure 5.13 is selected on the left panel and then click the top-most option on the right panel. An "Install" button will appear.
  • Install the kernel and then reboot for it to become active.
See if you are able to control brightness after the graphics driver loads.
thank you ! it worked and has been fixed. thank you so much. i was really under the impression that i updated once installed mint on the pc, looks like i have a long way ahead of me and once again i'm really grateful.
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SMG
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Re: unable to decrease my brightness

Post by SMG »

Entropy Boltzmann wrote: Sun Dec 12, 2021 3:32 pmthank you ! it worked and has been fixed. thank you so much. i was really under the impression that i updated once installed mint on the pc, looks like i have a long way ahead of me and once again i'm really grateful.
Glad to hear that worked.

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