I have the same issue.
In my case it helps to switch to another X-Window session and back, i.e.
Ctrl-Alt-F1, Ctrl-Alt-F2.
Excerpt from `lshw`
```
description: Notebook
product: 21SR0071PB (LENOVO_MT_21SR_BU_Think_FM_ThinkPad E16 Gen 3)
vendor: LENOVO
version: ThinkPad E16 Gen 3
serial: PF5JE15Y
width: 64 bits
capabilities: smbios-3.8.0 dmi-3.8.0 smp vsyscall32
configuration: administrator_password=disabled chassis=notebook
family=ThinkPad E16 Gen 3 power-on_password=disabled
sku=LENOVO_MT_21SR_BU_Think_FM_ThinkPad E16 Gen 3
uuid=5ccec84c-21ef-11b2-a85c-d799034382ab
*-core
description: Motherboard
product: 21SR0071PB
vendor: LENOVO
physical id: 0
version: SDK0T76530 WIN
serial: L1HF55M02HV
slot: Not Available
(...)
*-cpu
description: CPU
product: Intel(R) Core(TM) Ultra 7 255H
vendor: Intel Corp.
physical id: 15
bus info: cpu@0
version: 6.197.2
serial: None
slot: U3E1
size: 1800MHz
capacity: 5100MHz
width: 64 bits
clock: 100MHz
capabilities: lm fpu fpu_exception wp vme de pse tsc msr pae mce cx8
apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht
tm pbe syscall nx pdpe1gb rdtscp x86-64 constant_tsc art arch_perfmon pebs bts
rep_good nopl xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni
pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm
pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c
rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb ssbd ibrs ibpb stibp
ibrs_enhanced tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1
avx2 smep bmi2 erms invpcid rdseed adx smap clflushopt clwb intel_pt sha_ni
xsaveopt xsavec xgetbv1 xsaves split_lock_detect user_shstk avx_vnni lam
wbnoinvd dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp
hwp_pkg_req hfi vnmi umip pku ospke waitpkg gfni vaes vpclmulqdq rdpid
bus_lock_detect movdiri movdir64b fsrm md_clear serialize arch_lbr ibt
flush_l1d arch_capabilities cpufreq
configuration: cores=16 enabledcores=16 microcode=280 threads=16
(...)
*-display
description: VGA compatible controller
product: Arrow Lake-P [Intel Graphics]
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
logical name: /dev/fb0
version: 03
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm vga_controller bus_master cap_list
rom fb
configuration: depth=32 driver=i915 latency=0 mode=1920x1200
resolution=1920,1200 visual=truecolor xres=1920 yres=1200
resources: iomemory:400-3ff iomemory:400-3ff irq:193
memory:4038000000-4038ffffff memory:4000000000-400fffffff memory:c0000-dffff
memory:403a000000-4040ffffff
```
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https://bugs.launchpad.net/bugs/2110024
Title:
External HDMI monitor freezes with Intel Arc Graphics (Core Ultra 7)
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2110024/+subscriptions
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