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Thanks #. Will give serious considerations to an AMD GPU if prices ever become reasonable again. #
Apr 29 18:16:19 threeflex kernel: general protection fault, probably for non-canonical address 0xdead00000000012a: 0000 [#1] PREEMPT SMP NOPTI
Apr 29 18:16:19 threeflex kernel: CPU: 12 PID: 130275 Comm: chromium Tainted: P           OE     5.15.11-arch2-1 #1 03010ffba27108079ccfa4d61c5b01422e5fb7c7
Apr 29 18:16:19 threeflex kernel: Hardware name: Micro-Star International Co., Ltd MS-7C02/B450 TOMAHAWK MAX (MS-7C02), BIOS 3.50 11/07/2019
Apr 29 18:16:19 threeflex kernel: RIP: 0010:_nv028370rm+0x35/0x90 [nvidia]
Apr 29 18:16:19 threeflex kernel: Code: 57 10 31 c0 48 85 d2 74 2e 48 8b 4f 08 31 c0 48 85 c9 74 0d 48 63 41 14 48 89 d6 48 29 c6 48 89 f0 48 3b 57 18 48 89 07 74 1b <48> 8b 42 08 48 89 47 10 b8 01 00 00 00 48 83 c4 08 c3 66 0f 1f 84
Apr 29 18:16:19 threeflex kernel: RSP: 0018:ffffb3e08a2efb00 EFLAGS: 00010287
Apr 29 18:16:19 threeflex kernel: RAX: dead000000000122 RBX: ffff96358b1f4c30 RCX: ffff963971773180
Apr 29 18:16:19 threeflex kernel: RDX: dead000000000122 RSI: dead000000000122 RDI: ffff9639561bdd00
Apr 29 18:16:19 threeflex kernel: RBP: ffff9639561bdd00 R08: 0000000000000000 R09: 0000000000000000
Apr 29 18:16:19 threeflex kernel: R10: 0000000000000000 R11: 0000000000000000 R12: ffff963bc98f7cd8
Apr 29 18:16:19 threeflex kernel: R13: ffffef8ec68f7872 R14: ffff963bc98f7cd8 R15: ffff963971770410
Apr 29 18:16:19 threeflex kernel: FS:  0000000000000000(0000) GS:ffff9643ded00000(0000) knlGS:0000000000000000
Apr 29 18:16:19 threeflex kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Apr 29 18:16:19 threeflex kernel: CR2: 00003bc004c3b800 CR3: 00000001b0e38000 CR4: 0000000000350ee0
Apr 29 18:16:19 threeflex kernel: Call Trace:
Apr 29 18:16:19 threeflex kernel:  <TASK>
Apr 29 18:16:19 threeflex kernel:  ? _nv034904rm+0xa8/0xe0 [nvidia f5c627456efed255443f0aa40c0ccceaecac7cd2]
Apr 29 18:16:19 threeflex kernel:  ? _nv014538rm+0x31b/0x7f0 [nvidia f5c627456efed255443f0aa40c0ccceaecac7cd2]
Apr 29 18:16:19 threeflex kernel:  ? _nv035206rm+0xac/0xe0 [nvidia f5c627456efed255443f0aa40c0ccceaecac7cd2]
Apr 29 18:16:19 threeflex kernel:  ? _nv036729rm+0xb0/0x140 [nvidia f5c627456efed255443f0aa40c0ccceaecac7cd2]
Apr 29 18:16:19 threeflex kernel:  ? _nv036728rm+0x30f/0x4f0 [nvidia f5c627456efed255443f0aa40c0ccceaecac7cd2]
Apr 29 18:16:19 threeflex kernel:  ? _nv036723rm+0x60/0x70 [nvidia f5c627456efed255443f0aa40c0ccceaecac7cd2]
Apr 29 18:16:19 threeflex kernel:  ? _nv036724rm+0x7b/0xb0 [nvidia f5c627456efed255443f0aa40c0ccceaecac7cd2]
Apr 29 18:16:19 threeflex kernel:  ? _nv035114rm+0x40/0xe0 [nvidia f5c627456efed255443f0aa40c0ccceaecac7cd2]
Apr 29 18:16:19 threeflex kernel:  ? _nv000693rm+0x68/0x80 [nvidia f5c627456efed255443f0aa40c0ccceaecac7cd2]
Apr 29 18:16:19 threeflex kernel:  ? rm_cleanup_file_private+0xea/0x170 [nvidia f5c627456efed255443f0aa40c0ccceaecac7cd2]
Apr 29 18:16:19 threeflex kernel:  ? nvidia_close+0x15e/0x310 [nvidia f5c627456efed255443f0aa40c0ccceaecac7cd2]
Apr 29 18:16:19 threeflex kernel:  ? nvidia_frontend_close+0x2b/0x50 [nvidia f5c627456efed255443f0aa40c0ccceaecac7cd2]
Apr 29 18:16:19 threeflex kernel:  ? __fput+0x8c/0x240
Apr 29 18:16:19 threeflex kernel:  ? task_work_run+0x5c/0x90
Apr 29 18:16:19 threeflex kernel:  ? do_exit+0x35c/0xac0
Apr 29 18:16:19 threeflex kernel:  ? do_group_exit+0x33/0xa0
Apr 29 18:16:19 threeflex kernel:  ? __x64_sys_exit_group+0x14/0x20
Apr 29 18:16:19 threeflex kernel:  ? do_syscall_64+0x5c/0x90
Apr 29 18:16:19 threeflex kernel:  ? syscall_exit_to_user_mode+0x23/0x50
Apr 29 18:16:19 threeflex kernel:  ? do_syscall_64+0x69/0x90
Apr 29 18:16:19 threeflex kernel:  ? syscall_exit_to_user_mode+0x23/0x50
Apr 29 18:16:19 threeflex kernel:  ? do_syscall_64+0x69/0x90
Apr 29 18:16:19 threeflex kernel:  ? exit_to_user_mode_prepare+0x12d/0x180
Apr 29 18:16:19 threeflex kernel:  ? syscall_exit_to_user_mode+0x23/0x50
Apr 29 18:16:19 threeflex kernel:  ? do_syscall_64+0x69/0x90
Apr 29 18:16:19 threeflex kernel:  ? entry_SYSCALL_64_after_hwframe+0x44/0xae
Apr 29 18:16:19 threeflex kernel:  </TASK>
Apr 29 18:16:19 threeflex kernel: ---[ end trace cdbc0ebc84e38781 ]---
Apr 29 18:16:19 threeflex kernel: RIP: 0010:_nv028370rm+0x35/0x90 [nvidia]
Apr 29 18:16:19 threeflex kernel: Code: 57 10 31 c0 48 85 d2 74 2e 48 8b 4f 08 31 c0 48 85 c9 74 0d 48 63 41 14 48 89 d6 48 29 c6 48 89 f0 48 3b 57 18 48 89 07 74 1b <48> 8b 42 08 48 89 47 10 b8 01 00 00 00 48 83 c4 08 c3 66 0f 1f 84
Apr 29 18:16:19 threeflex kernel: RSP: 0018:ffffb3e08a2efb00 EFLAGS: 00010287
Apr 29 18:16:19 threeflex kernel: RAX: dead000000000122 RBX: ffff96358b1f4c30 RCX: ffff963971773180
Apr 29 18:16:19 threeflex kernel: RDX: dead000000000122 RSI: dead000000000122 RDI: ffff9639561bdd00
Apr 29 18:16:19 threeflex kernel: RBP: ffff9639561bdd00 R08: 0000000000000000 R09: 0000000000000000
Apr 29 18:16:19 threeflex kernel: R10: 0000000000000000 R11: 0000000000000000 R12: ffff963bc98f7cd8
Apr 29 18:16:19 threeflex kernel: R13: ffffef8ec68f7872 R14: ffff963bc98f7cd8 R15: ffff963971770410
Apr 29 18:16:19 threeflex kernel: FS:  0000000000000000(0000) GS:ffff9643ded00000(0000) knlGS:0000000000000000
Apr 29 18:16:19 threeflex kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Apr 29 18:16:19 threeflex kernel: CR2: 00003bc004c3b800 CR3: 00000001b0e38000 CR4: 0000000000350ee0
Apr 29 18:16:19 threeflex kernel: Fixing recursive fault but reboot is needed!
in reply to Neil E. Hodges

I've been very happy with an RX570 using the open source Radeon driver for a few years, including playing hundreds of games both native and via Proton. Maybe look for a second hand one? I'm also considering upgrading to an RX6600XT as they seem to be approaching a decent price now.
in reply to Neil E. Hodges

I've all but entirely avoided the graphics-driver question (and Nvidia FWIW).

I'm curious what people are using if anything for GPU-based processing, if at all. Another realm I've all but entirely avoided.

By which I am excluding cryptocurrency / blockchain operations ... another area I've actively avoided.