I have a Dell Precision M4800 laptop running Debian with a custom built vanilla kernel 6.3.3 taken from kernel.org with this GPU shown in lspci:

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Venus XT [Radeon HD 8870M / R9 M270X/M370X] (rev ff)

I have HDMI out connected to my TV to play video games and watch movies, with the laptop lid shut. Whenever I play a 3D OpenGL game or use VLC to watch videos with hardware rendering enabled, I get a driver crash after a few minutes (more frequently and reliably reproduced with the OpenGL video game). The kernel stays up and I can ssh into it, but the TV screen loses signal. Heres the dmesg output:

[30834.383138] radeon 0000:01:00.0: ring 0 stalled for more than 10236msec
[30834.383144] radeon 0000:01:00.0: GPU lockup (current fence id 0x000000000006080c last fence id 0x0000000000060812 on ring 0)
[30835.171667] BUG: unable to handle page fault for address: ffffae54809f1ffc
[30835.171672] #PF: supervisor read access in kernel mode
[30835.171674] #PF: error_code(0x0000) - not-present page
[30835.171675] PGD 100000067 P4D 100000067 PUD 0 
[30835.171678] Oops: 0000 [#1] PREEMPT SMP PTI
[30835.171680] CPU: 0 PID: 13942 Comm: kworker/0:2H Tainted: G        W   E      6.3.3 #6
[30835.171683] Hardware name: Dell Inc. Precision M4800/0T3YTY, BIOS A09 06/26/2014
[30835.171684] Workqueue: radeon-crtc radeon_flip_work_func [radeon]
[30835.171731] RIP: 0010:radeon_ring_backup+0xc4/0x140 [radeon]
[30835.171764] Code: cd 49 89 06 48 85 c0 74 6d 41 8d 7c 24 ff 31 d2 48 c1 e7 02 eb 07 49 8b 06 48 83 c2 04 48 8b 75 10 8d 4b 01 89 db 48 8d 34 9e <8b> 36 89 34 10 23 4d 5c 89 cb 48 39 d7 75 dd 4c 89 ef e8 85 b7 b2
[30835.171766] RSP: 0018:ffffae5083217d60 EFLAGS: 00010206
[30835.171768] RAX: ffff8907ce600000 RBX: 00000000ffffffff RCX: 0000000000000000
[30835.171769] RDX: 0000000000000000 RSI: ffffae54809f1ffc RDI: 00000000000cb400
[30835.171770] RBP: ffff8905018895c0 R08: 0000000000000000 R09: 0000000000000006
[30835.171771] R10: 0000000000000002 R11: 0000000000000100 R12: 0000000000032d01
[30835.171772] R13: ffff8905018895a0 R14: ffffae5083217dc0 R15: ffff890501888000
[30835.171774] FS:  0000000000000000(0000) GS:ffff89081dc00000(0000) knlGS:0000000000000000
[30835.171775] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[30835.171776] CR2: ffffae54809f1ffc CR3: 000000037a61a003 CR4: 00000000001706f0
[30835.171777] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[30835.171778] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[30835.171779] Call Trace:
[30835.171791]  <TASK>
[30835.171794]  radeon_gpu_reset+0xb3/0x300 [radeon]
[30835.171827]  ? radeon_fence_wait_timeout+0x7c/0xe0 [radeon]
[30835.171854]  radeon_flip_work_func+0x201/0x260 [radeon]
[30835.171884]  ? __schedule+0x3c7/0xaa0
[30835.171888]  process_one_work+0x1e5/0x3f0
[30835.171891]  ? __pfx_worker_thread+0x10/0x10
[30835.171893]  worker_thread+0x54/0x3a0
[30835.171894]  ? __pfx_worker_thread+0x10/0x10
[30835.171895]  kthread+0xdc/0x100
[30835.171898]  ? __pfx_kthread+0x10/0x10
[30835.171900]  ret_from_fork+0x2c/0x50
[30835.171904]  </TASK>
[30835.171905] Modules linked in: intel_rapl_msr(E) intel_rapl_common(E) x86_pkg_temp_thermal(E) intel_powerclamp(E) coretemp(E) kvm_intel(E) kvm(E) irqbypass(E) ghash_clmulni_intel(E) iwldvm(E) sha512_ssse3(E) sha512_generic(E) snd_hda_codec_realtek(E) snd_hda_codec_generic(E) mac80211(E) ledtrig_audio(E) uvcvideo(E) snd_hda_codec_hdmi(E) libarc4(E) aesni_intel(E) videobuf2_vmalloc(E) uvc(E) snd_hda_intel(E) libaes(E) videobuf2_memops(E) snd_soc_rt5640(E) snd_intel_dspcfg(E) mei_wdt(E) mei_hdcp(E) crypto_simd(E) videobuf2_v4l2(E) snd_usb_audio(E) snd_intel_sdw_acpi(E) snd_soc_rl6231(E) iwlwifi(E) cryptd(E) snd_hda_codec(E) snd_usbmidi_lib(E) videodev(E) snd_soc_core(E) rapl(E) snd_hda_core(E) iTCO_wdt(E) snd_rawmidi(E) tpm_tis(E) dell_smm_hwmon(E) intel_cstate(E) mei_me(E) snd_seq_device(E) videobuf2_common(E) snd_compress(E) snd_hwdep(E) intel_pmc_bxt(E) tpm_tis_core(E) cfg80211(E) snd_pcm(E) iTCO_vendor_support(E) joydev(E) mc(E) intel_uncore(E) watchdog(E) snd_timer(E) sg(E) mei(E) wmi_bmof(E) at24(E) rfkill(E)
[30835.171939]  serio_raw(E) pcspkr(E) tpm(E) snd(E) rng_core(E) soundcore(E) evdev(E) ac(E) parport_pc(E) ppdev(E) lp(E) parport(E) fuse(E) configfs(E) ip_tables(E) x_tables(E) autofs4(E) ext4(E) crc32c_generic(E) crc16(E) mbcache(E) jbd2(E) amdgpu(E) drm_buddy(E) gpu_sched(E) sd_mod(E) t10_pi(E) hid_generic(E) crc64_rocksoft(E) crc64(E) sr_mod(E) crc_t10dif(E) crct10dif_generic(E) cdrom(E) usbhid(E) hid(E) radeon(E) i2c_algo_bit(E) ahci(E) drm_display_helper(E) libahci(E) cec(E) drm_ttm_helper(E) sdhci_pci(E) xhci_pci(E) e1000e(E) libata(E) ttm(E) cqhci(E) crct10dif_pclmul(E) xhci_hcd(E) crct10dif_common(E) ehci_pci(E) ptp(E) scsi_mod(E) drm_kms_helper(E) crc32_pclmul(E) sdhci(E) i2c_i801(E) ehci_hcd(E) crc32c_intel(E) psmouse(E) lpc_ich(E) i2c_smbus(E) scsi_common(E) mmc_core(E) usbcore(E) drm(E) pps_core(E) usb_common(E) battery(E) video(E) wmi(E) button(E)
[30835.171975] Unloaded tainted modules: snd_pcsp(E):1 ie31200_edac(E):1 pcc_cpufreq(E):2 acpi_cpufreq(E):2 fjes(E):2
[30835.171981] CR2: ffffae54809f1ffc
[30835.171983] ---[ end trace 0000000000000000 ]---
[30835.171984] RIP: 0010:radeon_ring_backup+0xc4/0x140 [radeon]
[30835.172016] Code: cd 49 89 06 48 85 c0 74 6d 41 8d 7c 24 ff 31 d2 48 c1 e7 02 eb 07 49 8b 06 48 83 c2 04 48 8b 75 10 8d 4b 01 89 db 48 8d 34 9e <8b> 36 89 34 10 23 4d 5c 89 cb 48 39 d7 75 dd 4c 89 ef e8 85 b7 b2
[30835.172018] RSP: 0018:ffffae5083217d60 EFLAGS: 00010206
[30835.172019] RAX: ffff8907ce600000 RBX: 00000000ffffffff RCX: 0000000000000000
[30835.172020] RDX: 0000000000000000 RSI: ffffae54809f1ffc RDI: 00000000000cb400
[30835.172021] RBP: ffff8905018895c0 R08: 0000000000000000 R09: 0000000000000006
[30835.172022] R10: 0000000000000002 R11: 0000000000000100 R12: 0000000000032d01
[30835.172023] R13: ffff8905018895a0 R14: ffffae5083217dc0 R15: ffff890501888000
[30835.172024] FS:  0000000000000000(0000) GS:ffff89081dc00000(0000) knlGS:0000000000000000
[30835.172025] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[30835.172026] CR2: ffffae54809f1ffc CR3: 000000037a61a003 CR4: 00000000001706f0
[30835.172027] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[30835.172028] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[30835.172029] note: kworker/0:2H[13942] exited with irqs disabled