Since updating from kernel 6.0.2 to 6.0.3 on openSUSE TW, KDE Plasma 5.26.1
running X11 or Wayland fails to start, after logging in from SDDM: 

* The cursor works, but no panel shows up, the desktop starts to freeze, i.e.
turns gray after a while
* Pressing CTRL+ALT+DEL opens the power-management overlay, where logging out
works
* Shutting down the system does not work after having logged in once, but takes
infinitely long and requires a forced shut down

Going back to kernel 6.0.2 fixes the issue. 

An interesting part of the journalctl is likely the following:

```
09:56:43 kernel: BUG: kernel NULL pointer dereference, address:
00000000000001c8
09:56:43 kernel: #PF: supervisor write access in kernel mode
09:56:43 kernel: #PF: error_code(0x0002) - not-present page
09:56:43 kernel: PGD 0 P4D 0
09:56:43 kernel: Oops: 0002 [#1] PREEMPT SMP NOPTI
09:56:43 kernel: CPU: 16 PID: 1419 Comm: rasdaemon Tainted: G           O      
6.0.3-1-default #1 openSUSE Tumbleweed 50a6ebc5cb1873d6b9c639843cdd1ed0089a1281
09:56:43 kernel: Hardware name: System manufacturer System Product Name/ROG
STRIX X570-E GAMING, BIOS 4204 02/24/2022
09:56:43 kernel: RIP: 0010:ring_buffer_wake_waiters+0x1c/0xa0
09:56:43 kernel: Code: 48 39 d0 73 ed 0f 0b eb e9 0f 1f 44 00 00 55 48 89 fd 53
48 63 de 83 fb ff 74 36 48 8b 47 40 48 8b 1c d8 48 81 c3 78 01 00 00 <48> 83 43
50 01 31 c9 31 d2 48 8d 7b 20 be 03 00 00 00 e8 cd af f3
09:56:43 kernel: RSP: 0018:ffffaa7a815a7e20 EFLAGS: 00010206
09:56:43 kernel: RAX: ffff908c434db500 RBX: 0000000000000178 RCX:
0000000000000010
09:56:43 kernel: RDX: ffff908c78ed8000 RSI: 0000000000000018 RDI:
ffff908c434da900
09:56:43 kernel: RBP: ffff908c434da900 R08: ffff908c50b82e00 R09:
ffff908c8206b200
09:56:43 kernel: R10: 0000000000000000 R11: 0000000000000001 R12:
ffff908c8206b200
09:56:43 kernel: R13: ffff908c4387ef20 R14: ffff908c90fddbc0 R15:
0000000000000000
09:56:43 kernel: FS:  00007fd7463a6340(0000) GS:ffff90934ee00000(0000)
knlGS:0000000000000000
09:56:43 kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
09:56:43 kernel: CR2: 00000000000001c8 CR3: 0000000105574000 CR4:
0000000000750ee0
09:56:43 kernel: PKRU: 55555554
09:56:43 kernel: Call Trace:
09:56:43 kernel:  <TASK>
09:56:43 kernel:  tracing_buffers_release+0x49/0x90
09:56:43 kernel:  __fput+0x91/0x250
09:56:43 kernel:  task_work_run+0x5c/0x90
09:56:43 kernel:  exit_to_user_mode_prepare+0x1cb/0x1f0
09:56:43 kernel:  syscall_exit_to_user_mode+0x17/0x40
09:56:43 kernel:  do_syscall_64+0x67/0x80
09:56:43 kernel:  ? syscall_exit_to_user_mode+0x17/0x40
09:56:43 kernel:  ? do_syscall_64+0x67/0x80
09:56:43 kernel:  ? do_syscall_64+0x67/0x80
09:56:43 kernel:  ? syscall_exit_to_user_mode+0x17/0x40
09:56:43 kernel:  ? do_syscall_64+0x67/0x80
09:56:43 kernel:  ? do_syscall_64+0x67/0x80
09:56:43 kernel:  ? do_syscall_64+0x67/0x80
09:56:43 kernel:  ? do_syscall_64+0x67/0x80
09:56:43 kernel:  ? do_syscall_64+0x67/0x80
09:56:43 kernel:  entry_SYSCALL_64_after_hwframe+0x63/0xcd
09:56:43 kernel: RIP: 0033:0x7fd74658e014
09:56:43 kernel: Code: 00 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90
90 f3 0f 1e fa 90 90 80 3d 8d 09 0f 00 00 74 13 b8 03 00 00 00 0f 05 <48> 3d 00
f0 ff ff 77 44 c3 0f 1f 00 48 83 ec 18 89 7c 24 0c e8 51
09:56:43 kernel: RSP: 002b:00007ffce5e64348 EFLAGS: 00000202 ORIG_RAX:
0000000000000003
09:56:43 kernel: RAX: 0000000000000000 RBX: 00007ffce5e64490 RCX:
00007fd74658e014
09:56:43 kernel: RDX: 0000000000000000 RSI: 00007ffce5e64540 RDI:
000000000000001d
09:56:43 kernel: RBP: 00007ffce5e65a10 R08: 000055939344e6c0 R09:
0000000000000000
09:56:43 kernel: R10: 0000000000000008 R11: 0000000000000202 R12:
0000000000000001
09:56:43 kernel: R13: 00007ffce5e644d8 R14: 000055939344e6c0 R15:
000055939344e6c0
09:56:43 kernel:  </TASK>
09:56:43 kernel: Modules linked in: amd64_edac(-) cmac algif_hash
algif_skcipher af_alg vboxdrv(O) qrtr bnep dmi_sysfs wacom nls_iso8859_1
nls_cp437 vfat fat intel_rapl_msr iwlmvm intel_rapl_common asus_ec_sensors
mac80211 libarc4 snd_hda_codec_realtek snd_hda_codec_generic btusb edac_mce_amd
snd_hda_codec_hdmi btrtl snd_usb_audio btbcm snd_hda_intel btintel
snd_intel_dspcfg btmtk snd_intel_sdw_acpi kvm_amd snd_hda_codec snd_usbmidi_lib
iwlwifi bluetooth snd_rawmidi snd_hda_core joydev snd_seq_device kvm
ecdh_generic eeepc_wmi snd_hwdep asus_wmi cfg80211 battery snd_pcm irqbypass
ledtrig_audio sparse_keymap r8169 platform_profile snd_timer video pcspkr
wmi_bmof efi_pstore mxm_wmi realtek snd igb k10temp i2c_piix4 mdio_devres
soundcore libphy rfkill dca tiny_power_button button acpi_cpufreq fuse configfs
ip_tables x_tables hid_generic usbhid amdgpu crct10dif_pclmul crc32_pclmul
polyval_clmulni polyval_generic gf128mul xhci_pci xhci_pci_renesas
drm_ttm_helper ttm xhci_hcd
09:56:43 kernel:  iommu_v2 gpu_sched ghash_clmulni_intel drm_buddy aesni_intel
drm_display_helper nvme usbcore crypto_simd cryptd cec ccp nvme_core sp5100_tco
rc_core wmi btrfs blake2b_generic libcrc32c crc32c_intel xor raid6_pq
v4l2loopback(O) videodev mc sg br_netfilter bridge stp llc dm_multipath dm_mod
scsi_dh_rdac scsi_dh_emc scsi_dh_alua msr efivarfs
09:56:43 kernel: CR2: 00000000000001c8
09:56:43 kernel: ---[ end trace 0000000000000000 ]---
09:56:43 kernel: RIP: 0010:ring_buffer_wake_waiters+0x1c/0xa0
09:56:43 kernel: Code: 48 39 d0 73 ed 0f 0b eb e9 0f 1f 44 00 00 55 48 89 fd 53
48 63 de 83 fb ff 74 36 48 8b 47 40 48 8b 1c d8 48 81 c3 78 01 00 00 <48> 83 43
50 01 31 c9 31 d2 48 8d 7b 20 be 03 00 00 00 e8 cd af f3
09:56:43 kernel: RSP: 0018:ffffaa7a815a7e20 EFLAGS: 00010206
09:56:43 kernel: RAX: ffff908c434db500 RBX: 0000000000000178 RCX:
0000000000000010
09:56:43 kernel: RDX: ffff908c78ed8000 RSI: 0000000000000018 RDI:
ffff908c434da900
09:56:43 kernel: RBP: ffff908c434da900 R08: ffff908c50b82e00 R09:
ffff908c8206b200
09:56:43 kernel: R10: 0000000000000000 R11: 0000000000000001 R12:
ffff908c8206b200
09:56:43 kernel: R13: ffff908c4387ef20 R14: ffff908c90fddbc0 R15:
0000000000000000
09:56:43 kernel: FS:  00007fd7463a6340(0000) GS:ffff90934ee00000(0000)
knlGS:0000000000000000
09:56:43 kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
09:56:43 kernel: CR2: 00000000000001c8 CR3: 0000000105574000 CR4:
0000000000750ee0
09:56:43 kernel: PKRU: 55555554
```



SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20221023
KDE Plasma Version: 5.26.1
KDE Frameworks Version: 5.99.0
Qt Version: 5.15.6
Kernel Version: 6.0.2-1-default (64-bit) / 6.0.3-1-default (64-bit)
Graphics Platform: Wayland
Graphics Processor: AMD Radeon RX 580 Series