I recently got my RX 6950xt. Installed it today to find it not displaying after posting. I've tried a CMOS reset, installing a different distro, (Pop!os to Debian) and that didn't display. Windows is the only thing working so far and I don't want to use it. I'm lost on what to do next. I put in my old graphics card, RTX 3070 and that displays and boots. I also tried reinstalling the drivers and that didn't work. Any help would be amazing.

Update: amdgpu.dc=0 does not fix the issue, I'm tired and really want to figure this one out guys but every forum is silent and everything I've tried online has failed. If someone has any idea of what to do please help.

Imperfect NVidia driver removal can prevent all FOSS graphics drivers from working properly. Your NVidia driver installation instructions should have come with removal instructions that must be followed to ensure removal success, a prerequisite to making an AMD GPU work.

If you append nomodeset to your kernel's linu line in Grub, do you get a boot with lowfi graphical output?

Boot a recent kernel 6.x based live Linux e.g. from an USB stick. If you get correct graphical output your installed Linux distros are contaminated with proprietory nvidia stuff. Complete removal of proprietory nvidia driver is extremely difficult or impossible. A clean install of a recent Linux distro may save a lot of time and prevent more frustration. This Linux distro must provide /lib/firmware/amdgpu. Otherwise your AMD Radeon RX 6950 XT won't work properly.

I've installed Debian on my computer and I've used "nomodeset" and that is the only way it will display in x11 only, It will not display without it, including any other live-distros. I did some digging in the logs and found this talking about the smu failure:

Dec 31 08:41:36 GamingPC kernel: hid-steam 0003:28DE:1142.0009: Steam wireless receiver connected
Dec 31 08:41:36 GamingPC kernel: usb 1-6: reset full-speed USB device number 4 using xhci_hcd
Dec 31 08:41:36 GamingPC kernel: usb 1-6: reset full-speed USB device number 4 using xhci_hcd
Dec 31 08:41:36 GamingPC kernel: usb 1-6: reset full-speed USB device number 4 using xhci_hcd
Dec 31 08:41:36 GamingPC kernel: amdgpu 0000:2f:00.0: amdgpu: SMU: I'm not done with your previous command: SMN_C2PMSG_66:0x00000006 SMN_C2PMSG_82:0x00000000
Dec 31 08:41:36 GamingPC kernel: amdgpu 0000:2f:00.0: amdgpu: Failed to enable requested dpm features!
Dec 31 08:41:36 GamingPC kernel: amdgpu 0000:2f:00.0: amdgpu: Failed to setup smc hw!
Dec 31 08:41:36 GamingPC kernel: [drm:amdgpu_device_init.cold [amdgpu]] *ERROR* hw_init of IP block <smu> failed -62
Dec 31 08:41:36 GamingPC kernel: amdgpu 0000:2f:00.0: amdgpu: amdgpu_device_ip_init failed
Dec 31 08:41:36 GamingPC kernel: amdgpu 0000:2f:00.0: amdgpu: Fatal error during GPU init
Dec 31 08:41:36 GamingPC kernel: amdgpu 0000:2f:00.0: amdgpu: amdgpu: finishing device.
Dec 31 08:41:36 GamingPC kernel: ------------[ cut here ]------------
Dec 31 08:41:36 GamingPC kernel: WARNING: CPU: 8 PID: 204 at drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c:655 amdgpu_irq_put+0x45/0x70 [amdgpu]
Dec 31 08:41:36 GamingPC kernel: Modules linked in: hid_steam hid_generic usbhid hid amdgpu(+) gpu_sched drm_buddy video i2c_algo_bit drm_display_helper sd_mod cec rc_core drm_ttm_helper ahci ttm libahci xhci_pci drm_kms_helper xhci_hcd nvme libata drm nvme_core r8169 mxm_wmi crc32_pclmul usbcore t10_pi crc32c_intel realtek mdio_devres scsi_mod i2c_piix4 libphy crc64_rocksoft crc64 scsi_common crc_t10dif usb_common crct10dif_generic crct10dif_pclmul crct10dif_common wmi button
Dec 31 08:41:36 GamingPC kernel: CPU: 8 PID: 204 Comm: (udev-worker) Not tainted 6.1.0-16-amd64 #1 Debian 6.1.67-1

I also found a post of someone who might have had a simular problem recently

https://community.amd.com/t5/drivers...read-id/185991

thank you for your replies and suggentions

This link https://bbs.archlinux.org/viewtopic.php?id=262013 mentions that this card may have issues with PCIe3 slots and/or cables. Is your hardware PCIe4 capable?

Yes, my motherboard is a x570 unify. Pcie 4.0 compatable

So I've got a new update. The graphics card does not work on windows. It only works till the drivers are installed. I'm thinking this card might be DOA. I just got it on a sale "open box" so it cpuld be that it was broken beforehand. If anyone thinks otherwise that would be great to hear.

Hi, Looks like you had a go at the bios, but I'd persist.

I would reset the motherboard bios with the card out. (disconnect the drives too, save time.)

And/or reset nvram... as mentioned in the webpage.
https://devicetests.com/resetting-bios-ubuntu

If a current live distro won't boot <edit>to a full GUI</edit>, you may be too early for GNU/Linux with that card on that chipset. (too new)

All the best.

Your description looks like a dying graphics card … or a degrading PSU. The AMD Radeon 6950 XT draws a max. power of 335 W.

AMD X570 chipset itself is not too new for Linux. A compatibility issue with the AMD Radeon 6950 XT cannot 100% excluded. A system with an AMD Radeon 6600 on AMD X570 chipset and kernel 6.1.57 is working here.

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I agree, the card is "probably" DOA.

But, how is your power supply, can it keep up with the new requirements of power?

My psu is a 850w corsair rm850. I know that is lower then many but I only have a 5600x installed so I would assume that it doesn't suck enough wattage to overwhelm my psu.

Thanks for that, just checking.

Np, I'm gonna return the GPU, probably gonna have to pay for thr shipping fees but that's alright, I learned a bit from this. Thank you all for your help and I wish you all a good year ��

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