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I installed "Brightness Controller", didn't help. I tried to change grub to acpi_osi=Linux and similar. Nothing helps. It is on max setting by default unchangeable. When I remove nomodeset, my screen starts blinking violently on each mouse move... What's going on?

uname -a                                              
Linux x 5.11.0-27-generic #29~20.04.1-Ubuntu SMP Wed x86_64 x86_64 x86_64 GNU/Linux

ubuntu-drivers devices


    

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Graphics:  Device-1: Intel vendor: Lenovo driver: i915 v: kernel bus ID: 00:02.0 
           Display: x11 server: X.Org 1.20.11 driver: intel resolution: 2880x1800~90Hz 
           OpenGL: renderer: Mesa Intel Xe Graphics (TGL GT2) v: 4.6 Mesa 21.0.3 direct render: Yes

My computer is Lenovo Yoga. It's kinda better now that I use nvidia-drm.modeset=1 (doesn't flicker anymore) but it still has many issues, there are sometimes weird spots appearing on a screen. How can I force it to use NVIDIA drivers?

sancho.s ReinstateMonicaCellio
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mrSuperEvening
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    The "what's going on"part can't be answered without knowing the hardware specifications and proprietary drivers versions, if applicable. Re: the other part please understand what nomodeset is for (temporary workaround, troubleshooting) and what it does (overrides graphical drivers forcing a generic fallback video mode). – ChanganAuto Aug 10 '21 at 21:00
  • @ChanganAuto So I will try to update graphical drivers – mrSuperEvening Aug 10 '21 at 21:16
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    Please edit the question to add the requested information (and confirm you're using standard Ubuntu or other flavor, DEs really make a difference) so someone can bring forth suggestions about the flicker. Updating graphics drivers isn't always possible or even recommended. – ChanganAuto Aug 10 '21 at 21:18
  • I can't understand how on earth it is allowed for it to be so god damn buggy – mrSuperEvening Aug 16 '21 at 19:57
  • I am using Ubuntu 20.04, when I go to Additional Drivers there are no Nvidia drivers (it's just empty) – mrSuperEvening Aug 16 '21 at 19:58
  • If there's no Nvidia drivers suggested it has no Nvidia graphics. Again, please, post hardware specifications. – ChanganAuto Aug 16 '21 at 20:14
  • As @ChanganAuto has suggested many times, hardware information will be needed to answer this question with any real specificity. Can you [edit] your question to include the brand and model of the machine? – matigo Aug 17 '21 at 00:25
  • Without further details on your system, I suggest you update kernel/video drivers, if possible. This usually solves a lot of problems. ## Info to post In the meantime, please post the following info 1. Output of commands $ uname -a $ inxi -Fxz $ xrandr $ ubuntu-drivers devices If you don't have inxi and/or ubuntu-drivers you can install them with sudo apt install inxi ubuntu-drivers. 2. Brand/model of your computer 3. Why and how (the exact commands you used) you installed Brightness Controller. – sancho.s ReinstateMonicaCellio Aug 16 '21 at 21:46
  • What if yiou try GRUB_CMDLINE_LINUX_DEFAULT="rhgb quiet splash acpi_enforce_resources=lax pcie_ports=compat" – darth_epoxy Aug 22 '21 at 05:47
  • @darth_epoxy Nope, doesn't work, screen is blinking on mouse move... – mrSuperEvening Aug 24 '21 at 08:47

4 Answers4

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EDIT: For the Lenovo Yoga slim 7, the graphics cards is possibly Intel Iris Xe Graphics, and there is likely no NVIDIA GPU (yet to be confirmed).

The card apparently has some issues with the standard kernel of Ubuntu 20.04 (e.g., #1, #2).

Possible solutions:

  1. Disable Secure boot in the BIOS.
  2. Update to 20.10 or 21.04.
  3. Install OEM kernel 20.04 with sudo apt install linux-oem-20.04 && sudo reboot 0. You could also try with the newer linux-oem-20.04c, and further check available options with apt-cache search linux-oem-2.

Alternatively, you could try building/installing a newer 5.12 or even 5.13/5.14 kernel, YMMV. Or you can wait a short time with a current, workable condition, until newer kernels become standard.

I am not sure which of these options takes full advantage of both graphic units.

You did not post all requested info. There are plenty of Lenovo Yoga models. This potential solution may work, depending on your hardware.

Post the output of

$ dpkg -l | grep nvidia
$ dmesg | grep drm 
$ sudo lshw -c video
$ glxinfo -B
$ sudo lshw -C display
$ hwinfo --gfxcard
$ sudo update-pciids
$ lspci -v | egrep -i --color 'vga|3d|2d'

You will see one or two lines of output of lspci... The first line will likely be something like

00:02.0 VGA compatible controller: Intel Corporation ...

The first field 00:02.0 is the device ID. The second line (if present) will likely be something like

01:00.0 VGA compatible controller: NVIDIA Corporation ...

Then post the output of

$ sudo lspci -v -s <devide #1 ID>
$ sudo lspci -v -s <devide #2 ID>

If the second line reports an NVIDIA GPU, install the drivers with

$ sudo apt update
$ sudo apt upgrade
$ sudo apt install xserver-xorg-video-nouveau 
$ sudo apt install nvidia-driver-470

and reboot. The first line provides the open source nouveau drivers, which might be useful on occasion (and having them doesn't hurt). The second line provides proprietary drivers, which are generally preferred if they work.

After booting post the output of

$ ubuntu-drivers devices
$ dpkg -l | grep nvidia
$ nvidia-smi

Source: (one of many) https://www.cyberciti.biz/faq/ubuntu-linux-install-nvidia-driver-latest-proprietary-driver/

sancho.s ReinstateMonicaCellio
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    Dang it, Sancho, you always beat me to the punch. XD Good answer. – Nate T Aug 17 '21 at 09:18
  • I did this. It's still not working... I tried everything online it seems. It works only when I set nomodeset but then brightness buttons are not working. – mrSuperEvening Aug 17 '21 at 09:21
  • lenovo yoga slim 7 – mrSuperEvening Aug 17 '21 at 09:22
  • @mrSuperEvening man systemcmd read it. or systemctl you can set up aliases in bashrc. First use the commands to write a command which turns volume up by like 2%. Next do the same for down. then set them to aliases volup and voldown respectively. – Nate T Aug 17 '21 at 09:27
  • @mrSuperEvening - Please post the output of the commands listed. That is the best way to help others help you. I can hardly see a reason for not doing that. Otherwise, you are driving the way of "reverse engineering" the solution, which will only make it slower, or possibly making it not to happen. – sancho.s ReinstateMonicaCellio Aug 17 '21 at 10:13
  • @sancho.sReinstateMonicaCellio sudo apt install linux-oem-20.04 - thank you, it is much better now. The screen sometimes flickers (and produces weird patches on the screen), but it's better, I can use brightness buttons. – mrSuperEvening Aug 17 '21 at 10:36
  • @mrSuperEvening - I think you are facing a much current issue. It is up to you to post further info to get a better solution. – sancho.s ReinstateMonicaCellio Aug 17 '21 at 10:38
  • @mrSuperEvening - You could also try with the newer linux-oem-20.04c. – sancho.s ReinstateMonicaCellio Aug 17 '21 at 11:53
  • upgraded to 21.04, still the same – mrSuperEvening Aug 17 '21 at 14:17
  • == /sys/devices/:00/0000:00:06.0/0000:01:00.0 == modalias : vendor : NVIDIA Corporation model : TU117M [GeForce MX450] driver : nvidia-driver-460-server - distro non-free driver : nvidia-driver-470 - distro non-free recommended driver : nvidia-driver-460 - distro non-free driver : nvidia-driver-450-server - distro non-free driver : nvidia-driver-470-server - distro non-free driver : xserver-xorg-video-nouveau - distro free builtin``` – mrSuperEvening Aug 17 '21 at 14:17
  • Let us continue this discussion in chat. – mrSuperEvening Aug 17 '21 at 14:26
  • @mrSuperEvening Did you find a solution in the end? I am having basically the same Issue with Lenovo IdeaPad 5 Pro 14ITL06 with Intel Iris Xe GPU. Either I put 'nomodeset' into grub but I lose the ability to control brightness or I remove the 'nomodeset' option and I can control the brightness but the screen flickers whenever I move the mouse. I have Ubuntu 21.10 and tried many solutions like the one anove or the ones related to this question but to no avail. Any help appreciated. – David Jan 29 '22 at 09:21
  • @David Add i915.enable_psr=0 i8042.direct i8042.dumbkbd to GRUB_CMDLINE_LINUX_DEFAULT – mrSuperEvening Feb 01 '22 at 16:28
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The nomode set is for disabling the gpu drivers. When the GPU drivers are not loaded the brightness control won't work. Remove the nomodeset line. Then reboot normally. The brightness control should be working properly

Ashiq Tasdid
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Although it's like a brute force method it worked for me. Initially, when my Ubuntu was stuck at the purple screen:

I restarted the system.
Pressed E key and added nomodeset as: ro quiet splash &vt_handoff nomodeset.
Pressed F10 and once the system restarts , open terminal.
Write sudo gedit /etc/default/grub/ in the terminal.
Add nomodeset like this, GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"
Save the file and write sudo update-grub.

Now the main part:

Go to applications and open software and update.
Click additional drivers and choose the recommended one and NOT X.Org xserver.
Once Done with this, restart the system.
But this time again press E on grub menu and (remove) nomodeset and press F10.
The system will start normally.
Once started, open the grub file again as in step 4, but this time remove nomodeset and save the file.
Write sudo update-grub and restart the system.

Congratulations! Now your system will work perfectly with normal boot, without nomodeset and you would be able to inc/dec the screen brightness.

Erniemenendez
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Add i915.enable_psr=0 i8042.direct i8042.dumbkbd to GRUB_CMDLINE_LINUX_DEFAULT.

mrSuperEvening
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  • Thanks for the tip. So far I couldn't find the time to try it but once I will, I will let you know about the result. In the meantime could you please explain how does this solution work? – David Feb 05 '22 at 18:17