#StackBounty: #nvidia #display #display-resolution #external-monitor External WQHD monitor with NVIDIA NVS 4200M

Bounty: 100

I got a Lenovo T420s with a dedicated NVS 4200M Graphics Card running Ubuntu 18.04 and want to connect to an external monitor with WQHD resolution. However, when joining displays, the external monitor’s max resolution only goes up to 1920×1080 in the Displays settings:

Display settings

I tried connecting with both HDMI and DP. Weirdly, when I use DP, the monitor stays dark altogether (and does only “occasionally” show up in Displays settings), but I can drag windows over to it.

What more can I do to debug this?


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#StackBounty: #drivers #nvidia #18.04 #display-resolution #4k-monitor No more 4K Screen Resolution after Kernel Upgrade

Bounty: 50

Running Ubuntu 18.04, I noticed the problem twice after the kernel was upgraded (standard apt upgrade): a 4K resolution just yields a black screen. It falls back from 3840×2160 to 2560×1440.

After installing Ubunut again, it worked again – until the next kernel update.

Setup: nvidia-driver-390 (proprietary, the one shipped with Ubuntu that seems to be based on version 390.48), NVS 5200M. The video card is quite old, but does 4K at 30Hz. Also Windows worked stable in 4K.


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#StackBounty: #nvidia #nouveau Reverting to nouveau in ubuntu 18.04 doesn't work as expected

Bounty: 100

Since I had driver problems with nouveau on my Thinkpad (flickering external monitor on docking station) I switched to nvidia-390 and also to nvidia-396 both without success (didn’t even recognize the external screen on docking station).

Now I want to switch back to nouveau since then at least the external monitor worked if I connect it via mini-dp.

However I cannot switch back anymore. I did the following steps:

  • sudo apt-get purge '*-nvidia-*'
  • removed /etc/modprobe.d/blacklist-nouveau.conf (which I created when installing nvidia)
  • sudo update-initramfs -u
  • sudo reinstall xserver-xorg-core libgl1-mesa-glx xserver-xorg-video-nouveau
  • There was no /etc/X11/xorg.conf to remove or to modify
  • reboot

However then lspci -nnk | grep -iA2 vga
returns that

00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09)
    Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:21f5]
    Kernel driver in use: i915
--
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK107GLM [Quadro K2000M] [10de:0ffb] (rev a1)
    Subsystem: Lenovo GK107GLM [Quadro K2000M] [17aa:21f5]
    Kernel modules: nvidiafb, nouveau

I.e. additionally to nouveau there seems to be nvidiafb active. Then I tried to blacklist nvidiafb without success.

I also tried to disable framebuffer as described in the arch wiki also without success.

The problem is that this configuration doesn’t recognize any external monitor even on mini-dp. I just realized that even VGA doesn’t work.

Any idea of how I can make it work?

Are there any settings or files I should check to diagnose the cause of the problem?


Get this bounty!!!

#StackBounty: #nvidia #nouveau Reverting to nouveau in ubuntu 18.04 doesn't work as expected

Bounty: 100

Since I had driver problems with nouveau on my Thinkpad (flickering external monitor on docking station) I switched to nvidia-390 and also to nvidia-396 both without success (didn’t even recognize the external screen on docking station).

Now I want to switch back to nouveau since then at least the external monitor worked if I connect it via mini-dp.

However I cannot switch back anymore. I did the following steps:

  • sudo apt-get purge '*-nvidia-*'
  • removed /etc/modprobe.d/blacklist-nouveau.conf (which I created when installing nvidia)
  • sudo update-initramfs -u
  • sudo reinstall xserver-xorg-core libgl1-mesa-glx xserver-xorg-video-nouveau
  • There was no /etc/X11/xorg.conf to remove or to modify
  • reboot

However then lspci -nnk | grep -iA2 vga
returns that

00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09)
    Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:21f5]
    Kernel driver in use: i915
--
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK107GLM [Quadro K2000M] [10de:0ffb] (rev a1)
    Subsystem: Lenovo GK107GLM [Quadro K2000M] [17aa:21f5]
    Kernel modules: nvidiafb, nouveau

I.e. additionally to nouveau there seems to be nvidiafb active. Then I tried to blacklist nvidiafb without success.

I also tried to disable framebuffer as described in the arch wiki also without success.

The problem is that this configuration doesn’t recognize any external monitor even on mini-dp. I just realized that even VGA doesn’t work.

Any idea of how I can make it work?

Are there any settings or files I should check to diagnose the cause of the problem?


Get this bounty!!!

#StackBounty: #nvidia #nouveau Reverting to nouveau in ubuntu 18.04 doesn't work as expected

Bounty: 100

Since I had driver problems with nouveau on my Thinkpad (flickering external monitor on docking station) I switched to nvidia-390 and also to nvidia-396 both without success (didn’t even recognize the external screen on docking station).

Now I want to switch back to nouveau since then at least the external monitor worked if I connect it via mini-dp.

However I cannot switch back anymore. I did the following steps:

  • sudo apt-get purge '*-nvidia-*'
  • removed /etc/modprobe.d/blacklist-nouveau.conf (which I created when installing nvidia)
  • sudo update-initramfs -u
  • sudo reinstall xserver-xorg-core libgl1-mesa-glx xserver-xorg-video-nouveau
  • There was no /etc/X11/xorg.conf to remove or to modify
  • reboot

However then lspci -nnk | grep -iA2 vga
returns that

00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09)
    Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:21f5]
    Kernel driver in use: i915
--
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK107GLM [Quadro K2000M] [10de:0ffb] (rev a1)
    Subsystem: Lenovo GK107GLM [Quadro K2000M] [17aa:21f5]
    Kernel modules: nvidiafb, nouveau

I.e. additionally to nouveau there seems to be nvidiafb active. Then I tried to blacklist nvidiafb without success.

I also tried to disable framebuffer as described in the arch wiki also without success.

The problem is that this configuration doesn’t recognize any external monitor even on mini-dp. I just realized that even VGA doesn’t work.

Any idea of how I can make it work?

Are there any settings or files I should check to diagnose the cause of the problem?


Get this bounty!!!

#StackBounty: #nvidia #nouveau Reverting to nouveau in ubuntu 18.04 doesn't work as expected

Bounty: 100

Since I had driver problems with nouveau on my Thinkpad (flickering external monitor on docking station) I switched to nvidia-390 and also to nvidia-396 both without success (didn’t even recognize the external screen on docking station).

Now I want to switch back to nouveau since then at least the external monitor worked if I connect it via mini-dp.

However I cannot switch back anymore. I did the following steps:

  • sudo apt-get purge '*-nvidia-*'
  • removed /etc/modprobe.d/blacklist-nouveau.conf (which I created when installing nvidia)
  • sudo update-initramfs -u
  • sudo reinstall xserver-xorg-core libgl1-mesa-glx xserver-xorg-video-nouveau
  • There was no /etc/X11/xorg.conf to remove or to modify
  • reboot

However then lspci -nnk | grep -iA2 vga
returns that

00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09)
    Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:21f5]
    Kernel driver in use: i915
--
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK107GLM [Quadro K2000M] [10de:0ffb] (rev a1)
    Subsystem: Lenovo GK107GLM [Quadro K2000M] [17aa:21f5]
    Kernel modules: nvidiafb, nouveau

I.e. additionally to nouveau there seems to be nvidiafb active. Then I tried to blacklist nvidiafb without success.

I also tried to disable framebuffer as described in the arch wiki also without success.

The problem is that this configuration doesn’t recognize any external monitor even on mini-dp. I just realized that even VGA doesn’t work.

Any idea of how I can make it work?

Are there any settings or files I should check to diagnose the cause of the problem?


Get this bounty!!!

#StackBounty: #nvidia #nouveau Reverting to nouveau in ubuntu 18.04 doesn't work as expected

Bounty: 100

Since I had driver problems with nouveau on my Thinkpad (flickering external monitor on docking station) I switched to nvidia-390 and also to nvidia-396 both without success (didn’t even recognize the external screen on docking station).

Now I want to switch back to nouveau since then at least the external monitor worked if I connect it via mini-dp.

However I cannot switch back anymore. I did the following steps:

  • sudo apt-get purge '*-nvidia-*'
  • removed /etc/modprobe.d/blacklist-nouveau.conf (which I created when installing nvidia)
  • sudo update-initramfs -u
  • sudo reinstall xserver-xorg-core libgl1-mesa-glx xserver-xorg-video-nouveau
  • There was no /etc/X11/xorg.conf to remove or to modify
  • reboot

However then lspci -nnk | grep -iA2 vga
returns that

00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09)
    Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:21f5]
    Kernel driver in use: i915
--
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK107GLM [Quadro K2000M] [10de:0ffb] (rev a1)
    Subsystem: Lenovo GK107GLM [Quadro K2000M] [17aa:21f5]
    Kernel modules: nvidiafb, nouveau

I.e. additionally to nouveau there seems to be nvidiafb active. Then I tried to blacklist nvidiafb without success.

I also tried to disable framebuffer as described in the arch wiki also without success.

The problem is that this configuration doesn’t recognize any external monitor even on mini-dp. I just realized that even VGA doesn’t work.

Any idea of how I can make it work?

Are there any settings or files I should check to diagnose the cause of the problem?


Get this bounty!!!

#StackBounty: #nvidia #nouveau Reverting to nouveau in ubuntu 18.04 doesn't work as expected

Bounty: 100

Since I had driver problems with nouveau on my Thinkpad (flickering external monitor on docking station) I switched to nvidia-390 and also to nvidia-396 both without success (didn’t even recognize the external screen on docking station).

Now I want to switch back to nouveau since then at least the external monitor worked if I connect it via mini-dp.

However I cannot switch back anymore. I did the following steps:

  • sudo apt-get purge '*-nvidia-*'
  • removed /etc/modprobe.d/blacklist-nouveau.conf (which I created when installing nvidia)
  • sudo update-initramfs -u
  • sudo reinstall xserver-xorg-core libgl1-mesa-glx xserver-xorg-video-nouveau
  • There was no /etc/X11/xorg.conf to remove or to modify
  • reboot

However then lspci -nnk | grep -iA2 vga
returns that

00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09)
    Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:21f5]
    Kernel driver in use: i915
--
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK107GLM [Quadro K2000M] [10de:0ffb] (rev a1)
    Subsystem: Lenovo GK107GLM [Quadro K2000M] [17aa:21f5]
    Kernel modules: nvidiafb, nouveau

I.e. additionally to nouveau there seems to be nvidiafb active. Then I tried to blacklist nvidiafb without success.

I also tried to disable framebuffer as described in the arch wiki also without success.

The problem is that this configuration doesn’t recognize any external monitor even on mini-dp. I just realized that even VGA doesn’t work.

Any idea of how I can make it work?

Are there any settings or files I should check to diagnose the cause of the problem?


Get this bounty!!!

#StackBounty: #nvidia #nouveau Reverting to nouveau in ubuntu 18.04 doesn't work as expected

Bounty: 100

Since I had driver problems with nouveau on my Thinkpad (flickering external monitor on docking station) I switched to nvidia-390 and also to nvidia-396 both without success (didn’t even recognize the external screen on docking station).

Now I want to switch back to nouveau since then at least the external monitor worked if I connect it via mini-dp.

However I cannot switch back anymore. I did the following steps:

  • sudo apt-get purge '*-nvidia-*'
  • removed /etc/modprobe.d/blacklist-nouveau.conf (which I created when installing nvidia)
  • sudo update-initramfs -u
  • sudo reinstall xserver-xorg-core libgl1-mesa-glx xserver-xorg-video-nouveau
  • There was no /etc/X11/xorg.conf to remove or to modify
  • reboot

However then lspci -nnk | grep -iA2 vga
returns that

00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09)
    Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:21f5]
    Kernel driver in use: i915
--
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK107GLM [Quadro K2000M] [10de:0ffb] (rev a1)
    Subsystem: Lenovo GK107GLM [Quadro K2000M] [17aa:21f5]
    Kernel modules: nvidiafb, nouveau

I.e. additionally to nouveau there seems to be nvidiafb active. Then I tried to blacklist nvidiafb without success.

I also tried to disable framebuffer as described in the arch wiki also without success.

The problem is that this configuration doesn’t recognize any external monitor even on mini-dp. I just realized that even VGA doesn’t work.

Any idea of how I can make it work?

Are there any settings or files I should check to diagnose the cause of the problem?


Get this bounty!!!

#StackBounty: #nvidia #nouveau Reverting to nouveau in ubuntu 18.04 doesn't work as expected

Bounty: 100

Since I had driver problems with nouveau on my Thinkpad (flickering external monitor on docking station) I switched to nvidia-390 and also to nvidia-396 both without success (didn’t even recognize the external screen on docking station).

Now I want to switch back to nouveau since then at least the external monitor worked if I connect it via mini-dp.

However I cannot switch back anymore. I did the following steps:

  • sudo apt-get purge '*-nvidia-*'
  • removed /etc/modprobe.d/blacklist-nouveau.conf (which I created when installing nvidia)
  • sudo update-initramfs -u
  • sudo reinstall xserver-xorg-core libgl1-mesa-glx xserver-xorg-video-nouveau
  • There was no /etc/X11/xorg.conf to remove or to modify
  • reboot

However then lspci -nnk | grep -iA2 vga
returns that

00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09)
    Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:21f5]
    Kernel driver in use: i915
--
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK107GLM [Quadro K2000M] [10de:0ffb] (rev a1)
    Subsystem: Lenovo GK107GLM [Quadro K2000M] [17aa:21f5]
    Kernel modules: nvidiafb, nouveau

I.e. additionally to nouveau there seems to be nvidiafb active. Then I tried to blacklist nvidiafb without success.

I also tried to disable framebuffer as described in the arch wiki also without success.

The problem is that this configuration doesn’t recognize any external monitor even on mini-dp. I just realized that even VGA doesn’t work.

Any idea of how I can make it work?

Are there any settings or files I should check to diagnose the cause of the problem?


Get this bounty!!!