Fully updated F38 machine.
(Installed from scratch using an XFCE live image)

I have successfully been using a KVM switch between my machines
for 6 months or more.
"Some" recent kernels have introduced delays in switching and various
forms of lockup.
However the most recent kernel vmlinuz-6.4.4-200.fc38.x86_64 has caused
complete freezes of the machine, the only way out being a physical power off.

(I am writing this using kernel 6.3.11-200.fc38.x86_64 which seems OK)

During a "switch/freeze" journalctl shows very nasty errors given below.

Has anyone seen anything similar or any thoughts about the problem?

Thanks

John

"/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Jul 27 10:52:06 harting.jaa.org.uk audit: BPF prog-id=91 op=UNLOAD
Jul 27 10:52:06 harting.jaa.org.uk audit: BPF prog-id=90 op=UNLOAD
Jul 27 10:52:06 harting.jaa.org.uk audit: BPF prog-id=89 op=UNLOAD
Jul 27 10:52:28 harting.jaa.org.uk kernel: usb 2-2.1: new SuperSpeed USB device 
number 5 using xhci_hcd
Jul 27 10:52:28 harting.jaa.org.uk kernel: usb 2-2.1: New USB device found, 
idVendor=2109,
idProduct=0817, bcdDevice=90.23
Jul 27 10:52:28 harting.jaa.org.uk kernel: usb 2-2.1: New USB device strings: 
Mfr=1, Product=2,
SerialNumber=0
Jul 27 10:52:28 harting.jaa.org.uk kernel: usb 2-2.1: Product: USB3.0 Hub       
      
Jul 27 10:52:28 harting.jaa.org.uk kernel: usb 2-2.1: Manufacturer: VIA Labs, 
Inc.         
Jul 27 10:52:28 harting.jaa.org.uk kernel: hub 2-2.1:1.0: USB hub found
Jul 27 10:52:28 harting.jaa.org.uk kernel: hub 2-2.1:1.0: 4 ports detected
Jul 27 10:52:29 harting.jaa.org.uk kernel: usb 3-6.1: new high-speed USB device 
number 10 using xhci_hcd
Jul 27 10:52:29 harting.jaa.org.uk kernel: usb 3-6.1: New USB device found, 
idVendor=2109,
idProduct=2817, bcdDevice=90.23
Jul 27 10:52:29 harting.jaa.org.uk kernel: usb 3-6.1: New USB device strings: 
Mfr=1, Product=2,
SerialNumber=0
Jul 27 10:52:29 harting.jaa.org.uk kernel: usb 3-6.1: Product: USB2.0 Hub       
      
Jul 27 10:52:29 harting.jaa.org.uk kernel: usb 3-6.1: Manufacturer: VIA Labs, 
Inc.         
Jul 27 10:52:29 harting.jaa.org.uk kernel: hub 3-6.1:1.0: USB hub found
Jul 27 10:52:29 harting.jaa.org.uk kernel: hub 3-6.1:1.0: 4 ports detected
Jul 27 10:52:30 harting.jaa.org.uk kernel: usb 3-6.1.4: new full-speed USB 
device number 11 using
xhci_hcd
Jul 27 10:52:30 harting.jaa.org.uk kernel: usb 3-6.1.4: New USB device found, 
idVendor=046d,
idProduct=c52b, bcdDevice=12.11
Jul 27 10:52:30 harting.jaa.org.uk kernel: usb 3-6.1.4: New USB device strings: 
Mfr=1, Product=2,
SerialNumber=0
Jul 27 10:52:30 harting.jaa.org.uk kernel: usb 3-6.1.4: Product: USB Receiver
Jul 27 10:52:30 harting.jaa.org.uk kernel: usb 3-6.1.4: Manufacturer: Logitech
Jul 27 10:52:30 harting.jaa.org.uk kernel: logitech-djreceiver 
0003:046D:C52B.0010: hiddev97,hidraw2:
USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:06:00.3-6.1.4/input2
Jul 27 10:52:30 harting.jaa.org.uk mtp-probe[37470]: checking bus 3, device 11:
"/sys/devices/pci0000:00/0000:00:01.2/0000:01:00.0/0000:02:08.0/0000:06:00.3/usb3/3-6/3-6.1/3-6.1.4"
Jul 27 10:52:30 harting.jaa.org.uk mtp-probe[37470]: bus: 3, device: 11 was not 
an MTP device
Jul 27 10:52:30 harting.jaa.org.uk mtp-probe[37475]: checking bus 3, device 11:
"/sys/devices/pci0000:00/0000:00:01.2/0000:01:00.0/0000:02:08.0/0000:06:00.3/usb3/3-6/3-6.1/3-6.1.4"
Jul 27 10:52:30 harting.jaa.org.uk mtp-probe[37475]: bus: 3, device: 11 was not 
an MTP device
Jul 27 10:52:30 harting.jaa.org.uk kernel: logitech-hidpp-device 
0003:046D:4082.0011: HID++ 4.5 device
connected.
Jul 27 10:52:30 harting.jaa.org.uk kernel: logitech-hidpp-device 
0003:046D:4082.0011: HID++ 4.5 device
connected.
Jul 27 10:52:31 harting.jaa.org.uk kernel: input: Logitech MX Master 3 as
/devices/pci0000:00/0000:00:01.2/0000:01:00.0/0000:02:08.0/0000:06:00.3/usb3/3-6/3-6.1/3-6.1.4/3-
6.1.4:1.2/0003:046D:C52B.0010/0003:046D:4082.0011/input/input33
Jul 27 10:52:31 harting.jaa.org.uk kernel: logitech-hidpp-device 
0003:046D:4082.0011: input,hidraw3: USB
HID v1.11 Keyboard [Logitech MX Master 3] on usb-0000:06:00.3-6.1.4/input2:1
Jul 27 10:52:31 harting.jaa.org.uk systemd-logind[956]: Watching system buttons 
on /dev/input/event4
(Logitech MX Master 3)
Jul 27 10:52:34 harting.jaa.org.uk kernel: usb 3-6.1: USB disconnect, device 
number 10
Jul 27 10:52:34 harting.jaa.org.uk kernel: usb 3-6.1.4: USB disconnect, device 
number 11
Jul 27 10:52:34 harting.jaa.org.uk kernel: usb 2-2.1: USB disconnect, device 
number 5
Jul 27 10:52:34 harting.jaa.org.uk kernel: BUG: unable to handle page fault for 
address:
ffffb39658d6f7f0
Jul 27 10:52:34 harting.jaa.org.uk kernel: #PF: supervisor write access in 
kernel mode
Jul 27 10:52:34 harting.jaa.org.uk kernel: #PF: error_code(0x0002) - 
not-present page
Jul 27 10:52:34 harting.jaa.org.uk kernel: PGD 100000067 P4D 100000067 PUD 
10020b067 PMD 1cf8cf067 PTE 0
Jul 27 10:52:34 harting.jaa.org.uk kernel: Oops: 0002 [#1] PREEMPT SMP NOPTI
Jul 27 10:52:34 harting.jaa.org.uk kernel: CPU: 0 PID: 22373 Comm: kworker/0:0 
Not tainted 6.4.4-
200.fc38.x86_64 #1
Jul 27 10:52:34 harting.jaa.org.uk kernel: Hardware name: ASUS System Product 
Name/ROG CROSSHAIR VIII
IMPACT, BIOS 3003 12/04/2020
Jul 27 10:52:34 harting.jaa.org.uk kernel: Workqueue: usb_hub_wq hub_event
Jul 27 10:52:34 harting.jaa.org.uk kernel: RIP: 
0010:power_supply_uevent+0xee/0x1d0
Jul 27 10:52:34 harting.jaa.org.uk kernel: Code: 75 4e 48 8b 13 48 83 7a 28 00 
74 75 45 31 ff 31 c0 eb
10 48 8b 13 41 83 c7 01 49 63 c7 48 3b 42 28 73 5e 48 8b 52 20 8b 14 82 <f0> 48 
0f ab 54 24 08 48 8b 13
4c 89 f1 4c 89 e6 48 89 ef 48 8b 52
Jul 27 10:52:34 harting.jaa.org.uk kernel: RSP: 0018:ffffb39646efb7b8 EFLAGS: 
00010293
Jul 27 10:52:34 harting.jaa.org.uk kernel: RAX: 0000000000000002 RBX: 
ffff9f7cf5e22800 RCX:
ffff9f7d374b1000
Jul 27 10:52:34 harting.jaa.org.uk kernel: RDX: 000000008f3a018d RSI: 
0000000000000000 RDI:
ffff9f7cf5e22800
Jul 27 10:52:34 harting.jaa.org.uk kernel: RBP: ffff9f7cf5e22838 R08: 
0000000000000007 R09:
ffff9f7dc13e132c
Jul 27 10:52:34 harting.jaa.org.uk kernel: R10: ffffffffffffffff R11: 
0000000000000000 R12:
ffff9f7cc13e1000
Jul 27 10:52:34 harting.jaa.org.uk kernel: R13: 0000000000000000 R14: 
ffff9f7d374b1000 R15:
0000000000000002
Jul 27 10:52:34 harting.jaa.org.uk kernel: FS:  0000000000000000(0000) 
GS:ffff9f7f9ea00000(0000)
knlGS:0000000000000000
Jul 27 10:52:34 harting.jaa.org.uk kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 
0000000080050033
Jul 27 10:52:34 harting.jaa.org.uk kernel: CR2: ffffb39658d6f7f0 CR3: 
000000010108e000 CR4:
0000000000350ef0
Jul 27 10:52:34 harting.jaa.org.uk kernel: Call Trace:
Jul 27 10:52:34 harting.jaa.org.uk kernel:  <TASK>
Jul 27 10:52:34 harting.jaa.org.uk kernel:  ? __die+0x23/0x70
Jul 27 10:52:34 harting.jaa.org.uk kernel:  ? page_fault_oops+0x171/0x4e0
Jul 27 10:52:34 harting.jaa.org.uk kernel:  ? exc_page_fault+0x175/0x180
Jul 27 10:52:34 harting.jaa.org.uk kernel:  ? asm_exc_page_fault+0x26/0x30
Jul 27 10:52:34 harting.jaa.org.uk kernel:  ? power_supply_uevent+0xee/0x1d0
Jul 27 10:52:34 harting.jaa.org.uk kernel:  ? power_supply_uevent+0x10d/0x1d0
Jul 27 10:52:34 harting.jaa.org.uk kernel:  dev_uevent+0x112/0x2d0
Jul 27 10:52:34 harting.jaa.org.uk kernel:  kobject_uevent_env+0x294/0x680
Jul 27 10:52:34 harting.jaa.org.uk kernel:  power_supply_unregister+0x8e/0xa0
Jul 27 10:52:34 harting.jaa.org.uk kernel:  release_nodes+0x40/0xb0
Jul 27 10:52:34 harting.jaa.org.uk kernel:  devres_release_all+0x8c/0xc0
Jul 27 10:52:34 harting.jaa.org.uk kernel:  device_unbind_cleanup+0xe/0x70
Jul 27 10:52:34 harting.jaa.org.uk kernel:  
device_release_driver_internal+0x1cc/0x200
Jul 27 10:52:34 harting.jaa.org.uk kernel:  bus_remove_device+0xc6/0x130
Jul 27 10:52:34 harting.jaa.org.uk kernel:  device_del+0x15c/0x3e0
Jul 27 10:52:34 harting.jaa.org.uk kernel:  ? __queue_work+0x1df/0x440
Jul 27 10:52:34 harting.jaa.org.uk kernel:  hid_destroy_device+0x4b/0x60
Jul 27 10:52:34 harting.jaa.org.uk kernel:  logi_dj_remove+0x9a/0x100 
[hid_logitech_dj]
Jul 27 10:52:34 harting.jaa.org.uk kernel:  hid_device_remove+0x47/0x90
Jul 27 10:52:34 harting.jaa.org.uk kernel:  
device_release_driver_internal+0x19f/0x200
Jul 27 10:52:34 harting.jaa.org.uk kernel:  bus_remove_device+0xc6/0x130
Jul 27 10:52:34 harting.jaa.org.uk kernel:  device_del+0x15c/0x3e0
Jul 27 10:52:34 harting.jaa.org.uk kernel:  ? __queue_work+0x1df/0x440
Jul 27 10:52:34 harting.jaa.org.uk kernel:  hid_destroy_device+0x4b/0x60
Jul 27 10:52:34 harting.jaa.org.uk kernel:  usbhid_disconnect+0x47/0x60
Jul 27 10:52:34 harting.jaa.org.uk kernel:  usb_unbind_interface+0x93/0x270
Jul 27 10:52:34 harting.jaa.org.uk kernel:  
device_release_driver_internal+0x19f/0x200
Jul 27 10:52:34 harting.jaa.org.uk kernel:  bus_remove_device+0xc6/0x130
Jul 27 10:52:34 harting.jaa.org.uk kernel:  device_del+0x15c/0x3e0
Jul 27 10:52:34 harting.jaa.org.uk kernel:  ? kobject_put+0xa0/0x1d0
Jul 27 10:52:34 harting.jaa.org.uk kernel:  usb_disable_device+0xcd/0x1e0
Jul 27 10:52:34 harting.jaa.org.uk kernel:  usb_disconnect+0xde/0x2c0
Jul 27 10:52:34 harting.jaa.org.uk kernel:  usb_disconnect+0xc3/0x2c0
Jul 27 10:52:34 harting.jaa.org.uk kernel:  hub_event+0xf05/0x1ce0
Jul 27 10:52:34 harting.jaa.org.uk kernel:  ? srcu_invoke_callbacks+0x15c/0x190
Jul 27 10:52:34 harting.jaa.org.uk kernel:  process_one_work+0x1c7/0x3d0
Jul 27 10:52:34 harting.jaa.org.uk kernel:  worker_thread+0x51/0x390
Jul 27 10:52:34 harting.jaa.org.uk kernel:  ? __pfx_worker_thread+0x10/0x10
Jul 27 10:52:34 harting.jaa.org.uk kernel:  kthread+0xe8/0x120
Jul 27 10:52:34 harting.jaa.org.uk kernel:  ? __pfx_kthread+0x10/0x10
Jul 27 10:52:34 harting.jaa.org.uk kernel:  ret_from_fork+0x2c/0x50
Jul 27 10:52:34 harting.jaa.org.uk kernel:  </TASK>
Jul 27 10:52:34 harting.jaa.org.uk kernel: Modules linked in: rfcomm 
snd_seq_dummy snd_hrtimer
rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs 
nft_fib_inet nft_fib_ipv4
nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject 
nft_ct nft_chain_nat
nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ppdev parport_pc parport 
vmw_vsock_vmci_transport
vsock vmw_vmci ip_set nf_tables nfnetlink bnep nct6775 nct6775_core hwmon_vid 
sunrpc iwlmvm vfat
mac80211 fat intel_rapl_msr intel_rapl_common libarc4 snd_hda_codec_realtek 
edac_mce_amd
snd_hda_codec_generic snd_hda_codec_hdmi kvm_amd snd_hda_intel snd_intel_dspcfg 
snd_intel_sdw_acpi
iwlwifi snd_hda_codec kvm btusb snd_hda_core btrtl btbcm snd_hwdep snd_seq 
eeepc_wmi btintel asus_wmi
irqbypass btmtk snd_seq_device ledtrig_audio asus_ec_sensors cfg80211 
sparse_keymap snd_pcm rapl
platform_profile bluetooth wmi_bmof pcspkr snd_timer acpi_cpufreq mxm_wmi snd 
k10temp i2c_piix4
soundcore rfkill joydev loop zram hid_logitech_hidpp hid_logitech_dj amdgpu
Jul 27 10:52:34 harting.jaa.org.uk kernel:  drm_ttm_helper ttm video 
drm_suballoc_helper iommu_v2
drm_buddy crct10dif_pclmul crc32_pclmul crc32c_intel gpu_sched polyval_clmulni 
polyval_generic nvme
drm_display_helper ghash_clmulni_intel igb ccp nvme_core cec sha512_ssse3 
sp5100_tco dca nvme_common
i2c_algo_bit wmi fuse
Jul 27 10:52:34 harting.jaa.org.uk kernel: CR2: ffffb39658d6f7f0
Jul 27 10:52:34 harting.jaa.org.uk kernel: ---[ end trace 0000000000000000 ]---
Jul 27 10:52:34 harting.jaa.org.uk kernel: RIP: 
0010:power_supply_uevent+0xee/0x1d0
Jul 27 10:52:34 harting.jaa.org.uk kernel: Code: 75 4e 48 8b 13 48 83 7a 28 00 
74 75 45 31 ff 31 c0 eb
10 48 8b 13 41 83 c7 01 49 63 c7 48 3b 42 28 73 5e 48 8b 52 20 8b 14 82 <f0> 48 
0f ab 54 24 08 48 8b 13
4c 89 f1 4c 89 e6 48 89 ef 48 8b 52
Jul 27 10:52:34 harting.jaa.org.uk kernel: RSP: 0018:ffffb39646efb7b8 EFLAGS: 
00010293
Jul 27 10:52:34 harting.jaa.org.uk kernel: RAX: 0000000000000002 RBX: 
ffff9f7cf5e22800 RCX:
ffff9f7d374b1000
Jul 27 10:52:34 harting.jaa.org.uk kernel: RDX: 000000008f3a018d RSI: 
0000000000000000 RDI:
ffff9f7cf5e22800
Jul 27 10:52:34 harting.jaa.org.uk kernel: RBP: ffff9f7cf5e22838 R08: 
0000000000000007 R09:
ffff9f7dc13e132c
Jul 27 10:52:34 harting.jaa.org.uk kernel: R10: ffffffffffffffff R11: 
0000000000000000 R12:
ffff9f7cc13e1000
Jul 27 10:52:34 harting.jaa.org.uk kernel: R13: 0000000000000000 R14: 
ffff9f7d374b1000 R15:
0000000000000002
Jul 27 10:52:34 harting.jaa.org.uk kernel: FS:  0000000000000000(0000) 
GS:ffff9f7f9ea00000(0000)
knlGS:0000000000000000
Jul 27 10:52:34 harting.jaa.org.uk kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 
0000000080050033
Jul 27 10:52:34 harting.jaa.org.uk kernel: CR2: ffffb39658d6f7f0 CR3: 
000000010108e000 CR4:
0000000000350ef0
Jul 27 10:52:34 harting.jaa.org.uk kernel: note: kworker/0:0[22373] exited with 
irqs disabled
Jul 27 10:52:36 harting.jaa.org.uk abrt-dump-journal-oops[1007]: 
abrt-dump-journal-oops: Found oopses: 1
Jul 27 10:52:36 harting.jaa.org.uk abrt-dump-journal-oops[1007]: 
abrt-dump-journal-oops: Creating
problem directories
Jul 27 10:52:36 harting.jaa.org.uk abrt-server[37513]: Can't find a meaningful 
backtrace for hashing in
'.'
Jul 27 10:52:36 harting.jaa.org.uk abrt-server[37513]: Deleting non-reportable 
oops '.' because
DropNotReportableOopses is set to 'yes'
Jul 27 10:52:36 harting.jaa.org.uk abrt-server[37513]: 'post-create' on 
'/var/spool/abrt/oops-2023-07-
27-10:52:36-1007-0' exited with 1
Jul 27 10:52:36 harting.jaa.org.uk abrt-server[37513]: Deleting problem 
directory '/var/spool/abrt/oops-
2023-07-27-10:52:36-1007-0'
Jul 27 10:52:36 harting.jaa.org.uk abrt-server[37513]: Lock file '.lock' was 
locked by process 37525,
but it crashed?
Jul 27 10:52:37 harting.jaa.org.uk abrt-dump-journal-oops[1007]: Reported 1 
kernel oopses to Abrt


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