I've been encountering this problem with an RX 6600 using linux-image-5.15.0-22-lowlatency and linux-image-5.15.0-23-generic on Jammy. This had not been happening with linux-image-5.13.0-37-lowlatency on Impish.

[78421.618570] INFO: task gnome-shell:2364 blocked for more than 241 seconds.
[78421.618575]       Not tainted 5.15.0-23-generic #23-Ubuntu
[78421.618577] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[78421.618578] task:gnome-shell     state:D stack:    0 pid: 2364 ppid:  2194 flags:0x00004002
[78421.618581] Call Trace:
[78421.618583]  <TASK>
[78421.618585]  __schedule+0x23d/0x590
[78421.618590]  schedule+0x4e/0xb0
[78421.618591]  schedule_preempt_disabled+0xe/0x10
[78421.618593]  __mutex_lock.constprop.0+0x263/0x490
[78421.618596]  __mutex_lock_slowpath+0x13/0x20
[78421.618597]  mutex_lock+0x34/0x40
[78421.618598]  amdgpu_dm_atomic_commit_tail+0x5a5/0x1430 [amdgpu]
[78421.618737]  ? dcn30_calculate_wm_and_dlg_fp+0x7b0/0xac0 [amdgpu]
[78421.618861]  ? hubbub3_get_dcc_compression_cap+0x92/0x2d0 [amdgpu]
[78421.618995]  ? dcn20_get_dcc_compression_cap+0x23/0x30 [amdgpu]
[78421.619126]  ? fill_gfx9_plane_attributes_from_modifiers+0x217/0x2e0 [amdgpu]
[78421.619240]  ? dcn30_validate_bandwidth+0x1a0/0x340 [amdgpu]
[78421.619355]  ? ttm_bo_mem_compat+0x30/0x90 [ttm]
[78421.619359]  ? fill_plane_buffer_attributes+0x137/0x290 [amdgpu]
[78421.619470]  ? __cond_resched+0x1a/0x50
[78421.619472]  ? __wait_for_common+0x3e/0x150
[78421.619474]  ? dm_plane_helper_prepare_fb+0x236/0x290 [amdgpu]
[78421.619579]  ? usleep_range_state+0x90/0x90
[78421.619581]  ? wait_for_completion_timeout+0x1d/0x20
[78421.619583]  commit_tail+0xc5/0x170 [drm_kms_helper]
[78421.619593]  ? drm_atomic_helper_swap_state+0x246/0x370 [drm_kms_helper]
[78421.619601]  drm_atomic_helper_commit+0x123/0x150 [drm_kms_helper]
[78421.619608]  drm_atomic_commit+0x4a/0x50 [drm]
[78421.619623]  drm_mode_atomic_ioctl+0x530/0x740 [drm]
[78421.619636]  ? drm_plane_create_color_properties.cold+0x48/0x48 [drm]
[78421.619650]  ? drm_atomic_set_property+0x150/0x150 [drm]
[78421.619661]  drm_ioctl_kernel+0xae/0xf0 [drm]
[78421.619673]  drm_ioctl+0x264/0x4b0 [drm]
[78421.619683]  ? drm_atomic_set_property+0x150/0x150 [drm]
[78421.619695]  ? recalibrate_cpu_khz+0x10/0x10
[78421.619697]  ? ktime_get_mono_fast_ns+0x52/0xa0
[78421.619699]  amdgpu_drm_ioctl+0x4e/0x80 [amdgpu]
[78421.619770]  __x64_sys_ioctl+0x91/0xc0
[78421.619773]  do_syscall_64+0x5c/0xc0
[78421.619776]  ? syscall_exit_to_user_mode+0x27/0x50
[78421.619777]  ? do_syscall_64+0x69/0xc0
[78421.619778]  ? syscall_exit_to_user_mode+0x27/0x50
[78421.619779]  ? do_syscall_64+0x69/0xc0
[78421.619781]  ? do_syscall_64+0x69/0xc0
[78421.619782]  ? do_syscall_64+0x69/0xc0
[78421.619783]  ? irqentry_exit_to_user_mode+0x9/0x20
[78421.619784]  ? irqentry_exit+0x19/0x30
[78421.619785]  ? sysvec_apic_timer_interrupt+0x4e/0x90
[78421.619786]  ? asm_sysvec_apic_timer_interrupt+0xa/0x20
[78421.619788]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[78421.619789] RIP: 0033:0x7fd826692aff
[78421.619791] RSP: 002b:00007ffed2c1a150 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[78421.619793] RAX: ffffffffffffffda RBX: 00007ffed2c1a1f0 RCX: 00007fd826692aff
[78421.619794] RDX: 00007ffed2c1a1f0 RSI: 00000000c03864bc RDI: 0000000000000009
[78421.619794] RBP: 00000000c03864bc R08: 000000000000000f R09: 000000000000000f
[78421.619795] R10: 0000000000000007 R11: 0000000000000246 R12: 0000561f321406c0
[78421.619796] R13: 0000000000000009 R14: 0000561f33630420 R15: 0000561f349c6660
[78421.619797]  </TASK>
[78421.619966] INFO: task kworker/4:1:96189 blocked for more than 241 seconds.
[78421.619968]       Not tainted 5.15.0-23-generic #23-Ubuntu
[78421.619969] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[78421.619970] task:kworker/4:1     state:D stack:    0 pid:96189 ppid:     2 flags:0x00004000
[78421.619972] Workqueue: events drm_sched_job_timedout [gpu_sched]
[78421.619976] Call Trace:
[78421.619977]  <TASK>
[78421.619977]  __schedule+0x23d/0x590
[78421.619980]  schedule+0x4e/0xb0
[78421.619981]  schedule_preempt_disabled+0xe/0x10
[78421.619983]  __mutex_lock.constprop.0+0x263/0x490
[78421.619985]  __mutex_lock_slowpath+0x13/0x20
[78421.619986]  mutex_lock+0x34/0x40
[78421.619987]  dm_suspend+0xaa/0x270 [amdgpu]
[78421.620118]  ? nv_common_set_clockgating_state+0x9f/0xb0 [amdgpu]
[78421.620201]  ? amdgpu_device_set_cg_state+0x12f/0x280 [amdgpu]
[78421.620274]  amdgpu_device_ip_suspend_phase1+0xa7/0x190 [amdgpu]
[78421.620345]  amdgpu_device_ip_suspend+0x21/0x70 [amdgpu]
[78421.620415]  amdgpu_device_pre_asic_reset+0xdd/0x480 [amdgpu]
[78421.620485]  ? drm_fb_helper_set_suspend_unlocked+0x33/0xa0 [drm_kms_helper]
[78421.620493]  amdgpu_device_gpu_recover.cold+0x6ec/0x8f8 [amdgpu]
[78421.620621]  amdgpu_job_timedout+0x14f/0x170 [amdgpu]
[78421.620722]  drm_sched_job_timedout+0x6f/0x110 [gpu_sched]
[78421.620724]  process_one_work+0x22b/0x3d0
[78421.620727]  worker_thread+0x53/0x410
[78421.620729]  ? process_one_work+0x3d0/0x3d0
[78421.620730]  kthread+0x12a/0x150
[78421.620732]  ? set_kthread_struct+0x50/0x50
[78421.620734]  ret_from_fork+0x22/0x30
[78421.620737]  </TASK>