Problem with two screens

[Gigab]

Hello,
This morning I installed Linux Mint XFCE on my computer, which has two touch screens.

However, at startup, Linux recognizes only one screen.
In the settings, I only have one screen, and yet both are plugged in well.

Is there a setting or something that I missed that could cause Mint to recognize the 2nd screen?
Before doing the installation this morning, my PC was on Windows 10 and both screens were very well recognized.

Thank you very much for your response and have a nice day!

[SMG]

Hello,
This morning I installed Linux Mint XFCE on my computer, which has two touch screens.

However, at startup, Linux recognizes only one screen.
In the settings, I only have one screen, and yet both are plugged in well.

Welcome to the forum, Gigab.

Sometimes this type of situation can happen if all the graphics drivers have not installed properly. We would need to see the information requested in Section 5 of READ: How To Get Help! to know if that might be the case in this situation.

Please give us information about your install by entering this command in a terminal: inxi -Fxxxrz
Click </> from the mini toolbar above the textbox where you type your reply and then place your cursor between the code markers and paste the results of the command between the code markers [code]Results[/code]. This will let us know how Mint sees your hardware.

Please also let us know what type of connection (DP, HDMI, VGA) you are using to attach your monitors to your computer/GPU.

[Gigab]

Hello SMG
Thank you very much for your help.
Here is the result

Code: Select all

System:
  Kernel: 5.4.0-84-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 
  Desktop: Xfce 4.16.0 tk: Gtk 3.24.20 info: xfce4-panel wm: xfwm4 
  dm: LightDM 1.30.0 Distro: Linux Mint 20.2 Uma base: Ubuntu 20.04 focal 
Machine:
  Type: Desktop System: Gigabyte product: B450 I AORUS PRO WIFI v: N/A 
  serial: <filter> 
  Mobo: Gigabyte model: B450 I AORUS PRO WIFI-CF v: x.x serial: <filter> 
  UEFI: American Megatrends LLC. v: F61d date: 05/10/2021 
CPU:
  Topology: Quad Core model: AMD Ryzen 3 4300GE with Radeon Graphics 
  bits: 64 type: MT MCP arch: Zen rev: 1 L2 cache: 2048 KiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm 
  bogomips: 55892 
  Speed: 1397 MHz min/max: 1400/3500 MHz boost: enabled Core speeds (MHz): 
  1: 1397 2: 1397 3: 1395 4: 1397 5: 1397 6: 1397 7: 1396 8: 1401 
Graphics:
  Device-1: AMD Renoir vendor: Gigabyte driver: N/A bus ID: 0a:00.0 
  chip ID: 1002:1636 
  Display: x11 server: X.Org 1.20.11 driver: ati,fbdev 
  unloaded: modesetting,radeon,vesa resolution: 1024x768~76Hz 
  OpenGL: renderer: llvmpipe (LLVM 12.0.0 256 bits) v: 4.5 Mesa 21.0.3 
  compat-v: 3.1 direct render: Yes 
Audio:
  Device-1: AMD driver: snd_hda_intel v: kernel bus ID: 0a:00.1 
  chip ID: 1002:1637 
  Device-2: AMD Family 17h HD Audio vendor: Gigabyte driver: snd_hda_intel 
  v: kernel bus ID: 0a:00.6 chip ID: 1022:15e3 
  Device-3: ProdipeMIDIlilo type: USB driver: snd-usb-audio bus ID: 3-1:2 
  chip ID: 2381:0100 
  Sound Server: ALSA v: k5.4.0-84-generic 
Network:
  Device-1: Intel Wireless-AC 9260 driver: iwlwifi v: kernel bus ID: 06:00.0 
  chip ID: 8086:2526 
  IF: wlp6s0 state: down mac: <filter> 
  Device-2: Intel I211 Gigabit Network vendor: Gigabyte driver: igb 
  v: 5.6.0-k port: f000 bus ID: 08:00.0 chip ID: 8086:1539 
  IF: enp8s0 state: down mac: <filter> 
Drives:
  Local Storage: total: 465.76 GiB used: 9.08 GiB (1.9%) 
  ID-1: /dev/nvme0n1 vendor: Kingston model: SKC2500M8500G size: 465.76 GiB 
  speed: 31.6 Gb/s lanes: 4 serial: <filter> rev: S7780101 scheme: GPT 
Partition:
  ID-1: / size: 456.96 GiB used: 9.08 GiB (2.0%) fs: ext4 
  dev: /dev/nvme0n1p2 
Sensors:
  System Temperatures: cpu: 33.2 C mobo: N/A 
  Fan Speeds (RPM): N/A 
Repos:
  No active apt repos in: /etc/apt/sources.list 
  Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list 
  1: deb http://packages.linuxmint.com uma main upstream import backport #id:linuxmint_main
  2: deb http://archive.ubuntu.com/ubuntu focal main restricted universe multiverse
  3: deb http://archive.ubuntu.com/ubuntu focal-updates main restricted universe multiverse
  4: deb http://archive.ubuntu.com/ubuntu focal-backports main restricted universe multiverse
  5: deb http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
  6: deb http://archive.canonical.com/ubuntu/ focal partner
Info:
  Processes: 256 Uptime: 2m Memory: 62.27 GiB used: 705.6 MiB (1.1%) 
  Init: systemd v: 245 runlevel: 5 Compilers: gcc: 9.3.0 alt: 9 Shell: bash 
  v: 5.0.17 running in: xfce4-terminal inxi: 3.0.38 

I use dvi-hdmi cable (hdmi on PC to dvi screen)

Thank you

[SMG]

Your system is too new to be using the 5.4 LTS kernel which comes standard with Mint. It does not have the necessary graphics driver needed for your hardware.
Graphics:
Device-1: AMD Renoir vendor: Gigabyte driver: N/A bus ID: 0a:00.0
chip ID: 1002:1636
Display: x11 server: X.Org 1.20.11 driver: ati,fbdev
unloaded: modesetting,radeon,vesa resolution: 1024x768~76Hz
OpenGL: renderer: llvmpipe (LLVM 12.0.0 256 bits) v: 4.5 Mesa 21.0.3
compat-v: 3.1 direct render: Yes

Your system needs the 5.11 kernel available in Update Manager. Open Update Manager. Select View > Linux Kernels and click Continue. Make sure 5.11 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.

That will install the correct graphics driver and I expect both monitors will then work. Your system is currently running in software rendering mode (llvmpipe) which can not support two monitors.

[Gigab]

Ok il will do that .. but 5.11 is supported until February 2022.. what whill happen in 2022 ? i will have obsolete kernel without update ?

[SMG]

Ok il will do that .. but 5.11 is supported until February 2022.. what whill happen in 2022 ?

A newer kernel will be available before February and you will update to it to continue to receive a supported kernel.

[Gigab]

Ok il will do that .. but 5.11 is supported until February 2022.. what whill happen in 2022 ?

A newer kernel will be available before February and you will update to it to continue to receive a supported kernel.

Yes, but then my two screens will work again then ?

[SMG]

Yes, but then my two screens will work again then ?

Yes. Presuming they are working with the 5.11 kernel now. (There are other issue which can cause the monitor not to work, but a missing driver is the most common issue.)

The older kernel did not have the necessary graphics driver (because it was made before your hardware came out), but any newer kernel will contain the drivers.

[Gigab]

Yes, but then my two screens will work again then ?

Yes. Presuming they are working with the 5.11 kernel now. (There are other issue which can cause the monitor not to work, but a missing driver is the most common issue.)

The older kernel did not have the necessary graphics driver (because it was made before your hardware came out), but any newer kernel will contain the drivers.

thank you for all this information .. that reassures me well

[SMG]

Moderator Note: Gigab's new question can now be found here. Forum rules indicate new questions should be in a new thread and not added to existing threads.