Error vgacon disables amdgpu kernel modesetting

Thread: Unable to use AMD hardware-accelerated graphics on Kubuntu 20.04.2

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Unable to use AMD hardware-accelerated graphics on Kubuntu 20.04.2

Didn’t realise there was a dedicated hardware subforum, thread is now there: https://ubuntuforums.org/showthread. 237&p=14045827 Can’t figure out how to delete this thread though, sorry everyone.

This has actually been a problem that has been following me for a while and made me switch away from Arch Linux, so that’s always fun. I want to be able to use the hardware-accelerated graphics drivers for my AMD Radeon RX 570, but have been unable to do so. When I install them, I get the warning

doesn’t show amdgpu as the graphics driver, nothing of the sort.

Honestly, my real problem is that I have to use nomodeset to boot successfully but when I do I can’t use the drivers properly. It is. deeply irritating, and any help would be greatly appreciated. Honestly starting to think this might be a kernel bug but I don’t want to be too hasty.

Last edited by Tamara_Macadam; June 27th, 2021 at 09:28 AM . Reason: i made a silly

Re: Unable to use AMD hardware-accelerated graphics on Kubuntu 20.04.2

Update: I tried adding amdgpu.dpm=0 to the kernel parameters, but that didn’t change anything.

Here’s the results for when I do sudo dmesg | grep amdgpu, when nomodeset is not enabled:

And this is lshw -c video:

Here’s what happens with dmesg when nomodeset is enabled:

Aaaand lshw -c video:

Incidentally, when amdgpu.dpm=0 was in the kernel parameters, the display was getting a signal, but it was still completely black. When that wasn’t there, the display wasn’t receiving any signal at all.

Once again, any help would be greatly appreciated. Thanks!

Unable to use AMD hardware-accelerated graphics on Kubuntu 20.04.2

Didn’t realise there was a hardware subforum, oops.

This has actually been a problem that has been following me for a while and made me switch away from Arch Linux, so that’s always fun. I want to be able to use the hardware-accelerated graphics drivers for my AMD Radeon RX 570, but have been unable to do so. When I install them, I get the warning

The problem is that when I remove nomodeset and update GRUB and all that good stuff, upon next boot I just receive a black screen. The monitor shuts off because it’s not receiving a signal, and I am thus forced to add nomodeset back into the kernel parameters. I tried adding amdgpu.dpm=0 to the kernel parameters, but that didn’t change anything.

Here’s the results for when I do sudo dmesg | grep amdgpu, when nomodeset is not enabled:

And this is lshw -c video:

Here’s what happens with dmesg when nomodeset is enabled:

Aaaand lshw -c video:

Incidentally, when amdgpu.dpm=0 was in the kernel parameters, the display was getting a signal, but it was still completely black. When that wasn’t there, the display wasn’t receiving any signal at all.

Any help would be greatly appreciated. Thanks!

Re: Unable to use AMD hardware-accelerated graphics on Kubuntu 20.04.2

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Re: Unable to use AMD hardware-accelerated graphics on Kubuntu 20.04.2

Re: Unable to use AMD hardware-accelerated graphics on Kubuntu 20.04.2

I want to upgrade my Dell Optiplex to a discrete graphics card and one card I am considering is an RX 550, 4gb.

I would like to help you but obviously, I don’t have similar hardware yet. I do believe that this is an isolated case because lots of people have RX 550, 560, 570, 580 cards and use Linux, including Ubuntu. Why you are having that problem, I have no clue. However, my suggestion is to add more info in case someone here reads your post and notices something that offers a clue.

You might offer details on your hardware — cpu, memory, cable connection — is this using hdmi to hdmi or what? The problem of the black screen happens. I tested my Ubuntu iso on my usb flash drive at a friend’s — who has an nvidia card. I did get it to work but I used safe graphics mode.

AMD uses open source drivers — ‘amdgpu’ and you shouldn’t need nomodeset. I would try other things and take that out of the kernel parameters. Can you use an hdmi to hdmi cable connection? Is it hdmi 2.0? Amdgpu uses/requires kms and it’s disabled if you use nomodeset, hence the message.

P.S. do you get the same result if you try an Ubuntu 20.04 iso (run it at defaults and if it goes to black screen, choose safe graphics mode)? Try that and see what happens. You shouldn’t have to ‘install’ anything — if you use open source amdgpu drivers, it should just boot up and run.

Last edited by linuux; June 28th, 2021 at 12:25 AM .

Re: Unable to use AMD hardware-accelerated graphics on Kubuntu 20.04.2

I want to upgrade my Dell Optiplex to a discrete graphics card and one card I am considering is an RX 550, 4gb.

I would like to help you but obviously, I don’t have similar hardware yet. I do believe that this is an isolated case because lots of people have RX 550, 560, 570, 580 cards and use Linux, including Ubuntu. Why you are having that problem, I have no clue. However, my suggestion is to add more info in case someone here reads your post and notices something that offers a clue.

You might offer details on your hardware — cpu, memory, cable connection — is this using hdmi to hdmi or what? The problem of the black screen happens. I tested my Ubuntu iso on my usb flash drive at a friend’s — who has an nvidia card. I did get it to work but I used safe graphics mode.

AMD uses open source drivers — ‘amdgpu’ and you shouldn’t need nomodeset. I would try other things and take that out of the kernel parameters. Can you use an hdmi to hdmi cable connection? Is it hdmi 2.0? Amdgpu uses/requires kms and it’s disabled if you use nomodeset, hence the message.

P.S. do you get the same result if you try an Ubuntu 20.04 iso (run it at defaults and if it goes to black screen, choose safe graphics mode)? Try that and see what happens. You shouldn’t have to ‘install’ anything — if you use open source amdgpu drivers, it should just boot up and run.

I’m using an HDMI to HDMI connection, my monitor only supports HDMI. The CPU is an AMD Ryzen 5 2600, 16GB of memory, Asus Prime B450-Plus motherboard.

The problem is that I can’t boot up without nomodeset, so I’m unable to use amdgpu. The only way for me to boot is without graphics drivers. I’m not sure if it’s HDMI 2.0 or not, but it seems likely.

If I boot from an ISO, I get the black screen unless I use safe graphics. which enables nomodeset, thus disabling amdgpu.

EDIT: A thought occurs. On Arch Linux, the problem didn’t occur until I upgraded to the 5.12 kernel. Kubuntu 20.04.2 is using 5.8, and yet I’m having the same problem despite it working fine on 5.8 under Arch.

Could this be a hardware fault? I’m not sure how I’d check, is the thing, since I don’t really have a spare Radeon RX 570 or a spare PC just lying about.

Last edited by Tamara_Macadam; June 28th, 2021 at 03:05 AM . Reason: a thought! 😮

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[SOLVED] AMD GPU installation fails (AMD Radeon 6900XT)

[SOLVED] AMD GPU installation fails (AMD Radeon 6900XT)

Post by TheGermanDuke » Sun Jan 10, 2021 5:07 pm

I have a brand new Linux Mint 20 Ulyana installation on my dual boot PC:

GPU: AMD 6900XT
CPU: AMD 5950
Mainboard: Asus Rog Strix x570e
Two Monitors

I tried to install the AMD GPU pro drivers 20.45 from the AMD homepage. Installation showed to be successful. However, the PC would hang itself after reboot. I had to reboot in safe mode and deinstall the drivers.

I then tried to upgrade via ppa:

sudo add-apt-repository ppa:oibaf/graphics-drivers
sudo apt upgrade

I ran through, but did not install any AMD drivers:
«sudo lshw -C video» provided me with:

*-display UNCLAIMED
description: VGA compatible controller
product: Advanced Micro Devices, Inc. [AMD/ATI]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:0e:00.0
version: c0
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list
configuration: latency=0
resources: memory:d0000000-dfffffff memory:e0000000-e01fffff ioport:f000(size=256) memory:fc900000-fc9fffff memory:fca00000-fca1ffff

no driver shown under configuration.
The driver manager also does not show any drivers — just a blank screen saying: «Your computer does not need drivers»

The second display is also not recognized.

The only error message I get is during booting: «No irgq handler for vector.» but the Asus mainboard has newest bios.

The hardware is fine. I use the PC as dual boot and Windows 10 Pro works like a charm.

I am completely new to Linux and have no clue what to do next. Any advice would be highly appreciated.

Re: AMD GPU installation fails (AMD Radeon 6900XT)

Post by TheGermanDuke » Sun Jan 10, 2021 5:45 pm

I now have some additional information:

inxi -b provided the following:

System:
Host: RogueOnePrime Kernel: 5.4.0-60-generic x86_64 bits: 64
Desktop: Cinnamon 4.6.7 Distro: Linux Mint 20 Ulyana
Machine:
Type: Desktop Mobo: ASUSTeK model: ROG STRIX X570-E GAMING v: Rev X.0x
serial: UEFI: American Megatrends v: 3202
date: 01/04/2021
CPU:
16-Core: AMD Ryzen 9 5950X type: MT MCP speed: 2207 MHz
min/max: 2200/3400 MHz
Graphics:
Device-1: AMD driver: N/A
Display: x11 server: X.Org 1.20.9 driver: ati,fbdev
unloaded: modesetting,radeon,vesa resolution: 3840×2160

88Hz
OpenGL: renderer: llvmpipe (LLVM 11.0.0 256 bits) v: 4.5 Mesa 20.2.6
Network:
Device-1: Intel Wi-Fi 6 AX200 driver: iwlwifi
Device-2: Realtek RTL8125 2.5GbE driver: r8169
Device-3: Intel I211 Gigabit Network driver: igb
Drives:
Local Storage: total: 5.46 TiB used: 14.06 GiB (0.3%)
Info:
Processes: 509 Uptime: 3m Memory: 31.33 GiB used: 1.59 GiB (5.1%)
Shell: bash inxi: 3.0.38

so, no driver for the graphic card and two wrong driver for the display.

I also get the error mesagen on launch:

«Check your video drivers
Your system is currently running without video hardware acceleration. You may experience poor performance and high CPU usage.»

Hope that helps.

Re: AMD GPU installation fails (AMD Radeon 6900XT)

Post by SMG » Sun Jan 10, 2021 7:16 pm

Welcome to the forum, TheGermanDuke.

What problems were you having using the AMD graphics drivers that are included in the kernel and install automatically when you boot the system?

There has been a problem with the drivers from the AMD website and the latest kernels that I am not sure has been fixed yet.

I would suggest you reinstall Mint and use the Mint 20.1 Edge ISO. That comes with the 5.8 kernel which is probably a better fit for your newer equipment. However, you can first test it by booting into a session of Mint before you install it. After you are in that session, run inxi -Gx to see what drivers the system is using. I expect you will find the amdgpu drivers and AMD renderer working.

After you install and do any updates, make a Timeshift snapshot before testing any graphics drivers from PPA’s or other sources. They sometimes can not only cause problems, but also can be hard to remove completely. If you make a snapshot before you install, it is easy to roll back to your system’s previous state.

Re: AMD GPU installation fails (AMD Radeon 6900XT)

Post by TheGermanDuke » Sun Jan 10, 2021 8:03 pm

thanks for the feedback and sorry for the confusion. I already have Mint 20.1 and also tried the reinstall. The output of inxi -GX is the following:
Graphics:
Device-1: AMD driver: N/A bus ID: 0e:00.0
Display: x11 server: X.Org 1.20.9 driver: ati,fbdev
unloaded: modesetting,radeon,vesa resolution: 3840×2160

88Hz
OpenGL: renderer: llvmpipe (LLVM 11.0.0 256 bits) v: 4.5 Mesa 20.2.6
direct render: Yes

This bit was already included in my last post where I showed the results of inxi -b.

Perhaps somebody as an other idea how to solve the problem ?

Thanks a lot
TheGermanDuke

Re: AMD GPU installation fails (AMD Radeon 6900XT)

Post by SMG » Sun Jan 10, 2021 8:31 pm

I am editing this post because I just came across some information on your graphics card and it appears you are going to need something newer than the 5.8 kernel in the LM20.1 Edge ISO.

This article Radeon RX 6900 XT Launches As Flagship Card With Open-Source Drivers But Very Limited Availability indicates «The Linux support requirements for the RX 6900 XT are the same as the Radeon RX 6800 series: at least Linux 5.9.12, at least Mesa 20.2 but ideally Mesa 20.3 or 21.0-devel for the best experience, LLVM 11.0 (or LLVM 12 Git), and using linux-firmware.git. «

LM20.1 Edge ISO has Mesa 20.2.6 and LLVM 11.0 so it meets those minimum criteria, but you would need to use ukuu or mainline to install a newer kernel than what is currently available in Mint. I’ll go see what I can find about what version might be available through Ubuntu.

Re: AMD GPU installation fails (AMD Radeon 6900XT)

Post by SMG » Sun Jan 10, 2021 10:01 pm

Based on what I see here Index of /changelogs/pool/main/l/linux it appears there is a 5.10.0 kernel available. I do not know any specifics about it.

Re: AMD GPU installation fails (AMD Radeon 6900XT)

Post by TheGermanDuke » Mon Jan 11, 2021 3:26 am

). However, when I start with one of the 5.10.x kernels, the machine would not boot, i can only start in recovery mode with them.

inxi -b in recovery mode provides:

System:
Host: RogueOnePrime Kernel: 5.10.6-051006-generic x86_64 bits: 64
Desktop: Cinnamon 4.8.5 Distro: Linux Mint 20.1 Ulyssa
Machine:
Type: Desktop Mobo: ASUSTeK model: ROG STRIX X570-E GAMING v: Rev X.0x
serial: UEFI: American Megatrends v: 3202
date: 01/04/2021
CPU:
16-Core: AMD Ryzen 9 5950X type: MT MCP speed: 2236 MHz
min/max: 2200/3400 MHz
Graphics:
Device-1: AMD driver: N/A
Display: x11 server: X.Org 1.20.8 driver: ati,fbdev
unloaded: modesetting,radeon,vesa resolution: 3840×2160

88Hz
OpenGL: renderer: llvmpipe (LLVM 10.0.0 128 bits) v: 3.3 Mesa 20.0.8
Network:
Device-1: Intel Wi-Fi 6 AX200 driver: N/A
Device-2: Realtek RTL8125 2.5GbE driver: r8169
Device-3: Intel I211 Gigabit Network driver: igb
Drives:
Local Storage: total: 5.46 TiB used: 9.75 GiB (0.2%)
Info:
Processes: 481 Uptime: 1m Memory: 31.32 GiB used: 1.44 GiB (4.6%)
Shell: bash inxi: 3.0.38

I looked in the kernel log and there it shows that i am using the 5.8.0 kernel. Is that because I started 5.10.0 in recovery mode ?

Jan 11 08:52:50 RogueOne kernel: [ 0.000000] Linux version 5.8.0-33-generic (buildd@lgw01-amd64-010) (gcc (Ubuntu 9.3.0-17ubuntu1

20.04) 9.3.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #36

20.04.1-Ubuntu SMP Wed Dec 9 17:01:13 UTC 2020 (Ubuntu 5.8.0-33.36

Re: AMD GPU installation fails (AMD Radeon 6900XT)

Post by SMG » Mon Jan 11, 2021 11:03 am

Your inxi information indicates you are using the 5.10.6 kernel.

Host: RogueOnePrime Kernel: 5.10.6-051006-generic x86_64 bits: 64
Desktop: Cinnamon 4.8.5 Distro: Linux Mint 20.1 Ulyssa

Based on the information you posted, there is still an issue with the graphics and that would cause a black screen when booting.

Recovery mode disables graphics and some other drivers, so is is expected to see N/A for a graphics driver. However, the latest graphics information you posted (XOrg, Mesa, LLVM) seems to be from LM20.0 and not from LM20.1 even though your System information indicates LM20.1.

Graphics:
Device-1: AMD driver: N/A
Display: x11 server: X.Org 1.20.8 driver: ati,fbdev
unloaded: modesetting,radeon,vesa resolution: 3840×2160

88Hz
OpenGL: renderer: llvmpipe (LLVM 10.0.0 128 bits) v: 3.3 Mesa 20.0.8

While the llvmpipe could change because of the kernel, I would not expect the others to do so. Did you do a clean install of LM20.1 or did you do an upgrade from LM20.0?

For comparison, this is what you posted just prior to my posts. Notice the versions for XOrg, Mesa, and LLVM are newer.

88Hz
OpenGL: renderer: llvmpipe (LLVM 11.0.0 256 bits) v: 4.5 Mesa 20.2.6

Normally when having graphic issues, we ask people to follow the directions in the release notes to add nomodeset to boot until the graphics issues can be fixed. Go to the Release Notes for Linux Mint 21 Cinnamon and scroll to section on ‘Solving freezes during the boot sequence’ for instructions.

See if you can boot normally by using nomodeset . If so, please let me know if you did a clean install of LM20.1 or an upgrade and provide the output of inxi -Fxxxrz and put the results in code tags.

To put results in code tags, 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] as described in the graphic below. This puts the information in a neat, scrollable box.

Re: AMD GPU installation fails (AMD Radeon 6900XT)

Post by TheGermanDuke » Mon Jan 11, 2021 2:35 pm

Thanks a lot for your help!

In the the bootmanager I selceted Mint 20.1 (with the lastest 5.10.6 kernel) and then pressed e. After that I replaced «quiet splash» with «nomodeset» and pressed F10. After that the system started with no problems.

When i executed inxi -Fxxxrz the result was the following:

This is a clean install of LM20.1 (from the 20.1. Edge ISO you pointed me to) from a boot stick, overwriting the old installation. After that I only updated the Kernel to 5.10.6 with Mainline.

When I then reboot, I run again into a black screen (I assume because the change to nomodest is only temporary ?)

Does that help to narrow down the problem ? As I understand from the inxi output the computer is still using MESA 20.0.8 and as you explained to me I need at least 20.2. Is that the problem ? Its strange, isn’t it ? I really used the bootstick and it asked me if it should overwrite the existing installation and should modify the the bootmanager, which I confirmed. So it installed OEM. And in OEM I then said to finish the installation.

Re: AMD GPU installation fails (AMD Radeon 6900XT)

Post by SMG » Mon Jan 11, 2021 5:39 pm

Doing the change that way makes it only effective for the current boot cycle. It is possible to add it to grub so it happens each boot cycle. Until we can figure out what might be happening, that might be easier. I will put that info in a subsequent post.

I know there is an OEM installation with Mint, but I am not familiar with how it might different from a regular Mint installation. Even if there is a difference with it and the other ISO, I would think updating the files through Update Manager should fix it, so I am perplexed as to how the data you have now is showing the older information, so I am not sure what to do to fix it. If you open Update Manager, is everything showing as up to date after you press «Refresh»?

When you posted the data which showed the newer graphics info (XOrg, Mesa, LLVM), what steps did you take to get the system in a state such that it produced that data? That might give a clue as to the next step to take.

The only other idea I have right now is to boot into Mint using the 5.10.0 kernel instead of the 5.10.6 to see if the inxi information is any different. I would not think it would be, but I have heard the 5.10.0 kernel may be the next LTS kernel, so maybe there is something different about it. This time, just run inxi -SMCGx as that is where the information we want to focus on .

Re: AMD GPU installation fails (AMD Radeon 6900XT)

Post by SMG » Mon Jan 11, 2021 5:49 pm

To make nomodeset permanent as we test to figure out why the driver is not loading

Open the grub file: xed admin:///etc/default/grub

Change this line:

Update grub: sudo update-grub

And reboot to make it effective.

Re: AMD GPU installation fails (AMD Radeon 6900XT)

Post by TheGermanDuke » Mon Jan 11, 2021 6:06 pm

In my first post with LM 20.0 I had performed the following update after the initial installation:

Re: AMD GPU installation fails (AMD Radeon 6900XT)

Post by SMG » Mon Jan 11, 2021 7:12 pm

There are two parts here. One is the missing device driver and the other is «old» files.

The XOrg and Mesa versions are part of the Mint install for all graphics drivers. One should not have to install a PPA to get them. I have them in my LM20.1 install and I have Intel graphics. I do not have any PPA’s.

The other part is the missing device driver which is what I think is causing the boot problem. The part I put in red below should come from the kernel. It is showing as N/A right now because of nomodeset , but there needs to be something there for your RX 5600XT to work properly. That was also showing as N/A in your intial inxi information because you booted in Recovery Mode.

Graphics:
Device-1: AMD driver: N/A bus ID: 0e:00.0
Display: x11 server: X.Org 1.20.8 driver: ati,fbdev
unloaded: modesetting,radeon,vesa resolution: 3840×2160

88Hz
OpenGL: renderer: llvmpipe (LLVM 10.0.0 128 bits) v: 3.3 Mesa 20.0.8
direct render: Yes

My understanding of the PPA is that it would not add the missing device driver. The AMD Radeon™ RX 6900 XT Drivers & Support would be more likely to provide that file. Reading through the release notes of AMD, they indicate the drivers should be in the kernel, but they also indicate:

To get support for our latest graphics cards (Radeon RX 6×00 series), here are the components that you will need:

Kernel 5.10 or newer
Mesa 20.2 (or optionally, Oibaf mesa 21.0 from here: https://launchpad.net/

If you believe the PPA gave you the newer files, then that could be a plan to try. I would suggest taking a Timeshift snapshot before adding the PPA. Then add the PPA and see if that changes the «old» files to the newer ones we want to see.

If that shows the newer files, try booting without nomodeset to see if the kernel adds the device driver.

If that boot does not work, add nomodeset to boot. Then take another snapshot and try adding the AMD files. Reboot without nomodeset to see if the device driver loads.

If the PPA does NOT add the newer files, then maybe we can try an install of LM20.0 and update it to LM20.1 to try and get the newer files. Or try the regular non-Edge ISO of LM20.1. In any case, you’ll need to update to the 5.10 kernel, so it does not really matter if you use the regular LM20.1 ISO or the Edge one since neither one has the kernel you need. (But maybe for some reason the Edge ISO is missing the newer graphic files? I do not know.)

——————————
Note: I added the information so you could boot with permanent nomodeset . If you have added it to be permanent, you can use the information from the Ulyssa Release Notes (pressing e to modify) to remove nomodeset from that line for those boots where you are testing and do not want it.

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