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EBR

Member

Registered: 2022-06-09

Posts: 19

[SOLVED]Can't switch form radeon to amdgpu (GCN1)

I am trying to switch to amdgpu driver but i am new to this kind of knowledge.
Can someone please guide me with this?
(I tried the wiki but i wasn't able to achieve anything)
and Thank you

Last edited by EBR (2022-10-04 15:27:56)

schard

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From: Hannover

Registered: 2016-05-06

Posts: 2,276

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Re: [SOLVED]Can't switch form radeon to amdgpu (GCN1)

What did you try so far? There is an entire article on that topic.

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EBR

Member

Registered: 2022-06-09

Posts: 19

Re: [SOLVED]Can't switch form radeon to amdgpu (GCN1)

First I checked kernel driver with [lspci -k | grep -A 3 -E "(VGA|3D)"] give me this output:
    Kernel driver in use: radeon
    Kernel modules: radeon, amdgpu
I tried set module parameters like this:
   # modprobe radreon radeon.si_support=0
   # modprobe amdgpu amdgpu.si_support=1
didn't work
so i tried do it with grub:
and edit file /etc/default/grub
and add this radeon.si_support=0 amdgpu.si_support=1
to Grub_CMDLINE_LINUX_DEFAULT
and apply the changes with [sudo grub-mkconfig -o /boot/grub/grub.cfgreboot]
didn't work
and finaly I tried to black list radeon which ended with pc won't display any gui
I think that's all

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 24,515

Re: [SOLVED]Can't switch form radeon to amdgpu (GCN1)

There's a second set of parameters, which card is this exactly? if it's cik you need to use cik_support instead of si_support, see the tip in https://wiki.archlinux.org/title/AMDGPU … gpu_driver as well.

Last edited by V1del (2022-10-04 14:14:23)

EBR

Member

Registered: 2022-06-09

Posts: 19

Re: [SOLVED]Can't switch form radeon to amdgpu (GCN1)

it's apu amd a6 5400b with Radeon HD 7540D
Southern Islands (GCN1)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 24,515

Re: [SOLVED]Can't switch form radeon to amdgpu (GCN1)

Did you apply the parameters correctly? do they show in cat /proc/cmdline ? if you opt for the config in modprobe.d you can be independent of your bootloader config. Can you actually post what you get from

sudo dmesg | grep amdgpu

?

FWIW wikipedia tells me this is a Terascale and not a GCN GPU, sometimes they have shared ids with GCN cards but are not actually GCN and thus can't use amdgpu even though it as the pid/vid matching, chances this is the case here are there.

Last edited by V1del (2022-10-04 15:15:25)

EBR

Member

Registered: 2022-06-09

Posts: 19

Re: [SOLVED]Can't switch form radeon to amdgpu (GCN1)

[    0.035448] Kernel command line: BOOT_IMAGE=/vmlinuz-linux root=UUID=2b0baaa7-a0ff-467b-9d9c-2363165ef72e rw rootfstype=ext4 loglevel=3 radeon.si_support=0 radeon.cik_support=0 amdgpu.si_support=1 amdgpu.cik_support=1 amdgpu.dc=1 amdgpu.dpm=1 amdgpu.modeset=1 quiet
[   17.418033] amdgpu: unknown parameter 'modeset' ignored
[   17.418563] [drm] amdgpu kernel modesetting enabled.
[   17.418687] amdgpu: Ignoring ACPI CRAT on non-APU system
[   17.418692] amdgpu: Virtual CRAT table created for CPU
[   17.418714] amdgpu: Topology: Add CPU node

EBR

Member

Registered: 2022-06-09

Posts: 19

Re: [SOLVED]Can't switch form radeon to amdgpu (GCN1)

looks like I played myself sorry for wasting your time guys