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flying_tacos
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Joined: 08 Mar 2022
Posts: 12
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 Posted: Fri Apr 19, 2024 9:03 pm Post subject: [SOLVED] No display after switch from Nvidia to AMD GPU |
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Hello wonderful world!
I have a PC that has been running Gentoo for a few years now with an old Nvidia GeForce GT 620. I use the proprietary driver to be able to play games. Even if the driver for this card is not supported anymore, everything is fine as long as I stick to kernel 6.1.
Recently I was given a slightly less old Radeon HD 7570 card (I like to think it's less old, but they came out at the same time actually...). I swapped it in yesterday and followed the wiki to make the changes required to use it, but it's not working.
Following this table on the wiki, I set | Code: | | VIDEO_CARDS="radeon r600" |
in /etc/portage/make.conf. Also I uninstalled the nvidia driver, unmasked the more recent kernels, and re-emerged everything. This led to the following situation.
Symptoms:
When the PC starts, the manufacturer's logo appears, then the Grub menu, then this text is displayed at the top:
| Code: |
Booting `Gentoo GNU/Linux'
Loading Linux 6.6.21-gentoo ...
Loading initial ramdisk ...
_
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And this text, more towards the center: | Code: | | EFI stub: Loaded initrd from LINUX_EFI_INITRD_MEDIA_GUID device path |
Normally, the kernel would then start printing stuff and the boot sequence would continue, but now nothing else changes on the screen. However I'm able to ssh into the machine, play music on the speakers, etc.
More information:
| Code: |
$ lspci -nnk
...
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Turks PRO [Radeon HD 7570] [1002:675d]
Subsystem: Pegatron Turks PRO [Radeon HD 7570] [1b0a:90bd]
01:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Turks HDMI Audio [Radeon HD 6500/6600 / 6700M Series] [1002:aa90]
Subsystem: Pegatron Turks HDMI Audio [Radeon HD 6500/6600 / 6700M Series] [1b0a:aa90]
Kernel driver in use: snd_hda_intel
...
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I just noticed that snd_hda_intel is loaded for the card's sound. Could it be that?
Here are the parts of my kernel's config related to graphics: https://bpa.st/WEBA
Thank you in advance for your help!
Last edited by flying_tacos on Sat Apr 20, 2024 5:58 pm; edited 1 time in total |
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NeddySeagoon
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Joined: 05 Jul 2003
Posts: 54276
Location: 56N 3W
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| Posted: Fri Apr 19, 2024 9:18 pm Post subject: |
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flying_tacos,
| Code: | | CONFIG_DRM_RADEON=y |
Its probably not loading firmware.
Be sure the linux-firmware is installed and flip that option to loadable module.
must be off too as it interferes with DRM_RADEON above.
If there is still a problem, make friends with wgetpaste and share your entire .config file.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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flying_tacos
n00b
Joined: 08 Mar 2022
Posts: 12
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| Posted: Sat Apr 20, 2024 2:27 am Post subject: |
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Amazing, it works! Thank you Neddy!
(Well, X doesn't work, but that's a subject for another topic if I cannot figure it out)
I think what made the difference was to compile DRM_RADEON as a module, because I did try with and without FB_RADEON during my tests.
Now there is only one thing that is strange. During the boot sequence, this gets printed:
| Code: |
* Loading module nvidia ...
modprobe: FATAL: Module nvidia not found in directory /lib/modules/6.6.21-gentoo
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I thought I removed everything related to Nvidia from my system, but it seems I forgot to do something. However I cannot find where this is coming from. Do you have any idea? |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54276
Location: 56N 3W
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| Posted: Sat Apr 20, 2024 10:41 am Post subject: |
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flying_tacos,
There is some science behind it.
CONFIG_DRM_RADEON requires to load firmware as part of the initalisation. For you its at least
| Code: | $ ls /lib/firmware/radeon | grep -i turks
TURKS_mc.bin
TURKS_me.bin
TURKS_pfp.bin
TURKS_smc.bin |
see the Radeon page on the wiki.
With =Y, module initialisation happens before root is mounted, so /lib/firmware cannot be read. Instead the firmware must be included in the kernel binary by using CONFIG_EXTRA_FIRMWARE= and CONFIG_EXTRA_FIRMWARE_DIR=
You didn't show those .config entries in your pastebin.
| Code: | * Loading module nvidia ...
modprobe: FATAL: Module nvidia not found in directory /lib/modules/6.6.21-gentoo |
Somewhere is /etc you will have a configuration file trying to load the nvidia kernel module.
Try | Code: | | grep -i nvidia -R /etc |
to locate the entry add -Bx where X is some integer to discover the directory.
-Bx means show x lines Before.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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flying_tacos
n00b
Joined: 08 Mar 2022
Posts: 12
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| Posted: Sat Apr 20, 2024 5:58 pm Post subject: |
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I wanted to paste my whole .config, but it said files could not be bigger than 512 KiB, even though it was only 124 KiB... Not sure what happened. Anyway, that's a clear explanation, thank you. For reference, the only line in my .config that contains EXTRA_FIRMWARE is CONFIG_EXTRA_FIRMWARE=""
For the nvidia module, you were completely right: /etc/modules-load.d/video.conf contained nvidia. I removed it and the error message is now gone. Thank you a lot! |
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NeddySeagoon
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Joined: 05 Jul 2003
Posts: 54276
Location: 56N 3W
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| Posted: Sat Apr 20, 2024 7:06 pm Post subject: |
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flying_tacos,
Different pastebins have different size limits.
Run wgetpaste -h to see a list of commands.
One of them lists sites. Try each in turn until one works.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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