igt@i915_selftest@live@guc - dmesg-warn - *ERROR* CT: Communication stalled for \d+ ms
<7> [505.043144] i915 0000:00:02.0: [drm:guc_enable_communication [i915]] GuC communication enabled
<6> [505.045518] i915 0000:00:02.0: [drm] HuC authenticated
<6> [505.050320] i915 0000:00:02.0: [drm] GuC submission enabled
<6> [505.050322] i915 0000:00:02.0: [drm] GuC SLPC enabled
<6> [505.062627] i915: Running intel_guc_live_selftests/intel_guc_steal_guc_ids
<3> [507.651109] i915 0000:00:02.0: [drm] *ERROR* CT: Communication stalled for 2059 ms, desc status=0x0,0x0
<3> [507.651396] i915 0000:00:02.0: [drm] *ERROR* CT: H2G Space: 12 (Bytes)
<3> [507.651411] i915 0000:00:02.0: [drm] *ERROR* CT: Head: 803 (Dwords)
<3> [507.651422] i915 0000:00:02.0: [drm] *ERROR* CT: Tail: 799 (Dwords)
<3> [507.651432] i915 0000:00:02.0: [drm] *ERROR* CT: G2H Space: 12284 (Bytes)
<3> [507.651442] i915 0000:00:02.0: [drm] *ERROR* CT: Head: 18
(Dwords)
<3> [507.651453] i915 0000:00:02.0: [drm] *ERROR* CT: Tail: 18
(Dwords)
<7> [510.657550] heartbeat rcs0 heartbeat {seqno:e9d3:2, prio:-1024} not ticking
<7> [510.657562] heartbeat Awake? 960
<7> [510.657564] heartbeat Barriers?: no
<7> [510.657566] heartbeat Latency: 0us
<7> [510.659431] heartbeat Runtime: 2735ms
<7> [510.659433] heartbeat Forcewake: 0 domains, 0 active
<7> [510.659436] heartbeat Heartbeat: 3008 ms ago
<7> [510.659440] heartbeat Reset count: 0 (global 1)
<7> [510.659442] heartbeat Properties:
<7> [510.659444] heartbeat heartbeat_interval_ms: 2500 [default 2500]
<7> [510.659446] heartbeat max_busywait_duration_ns: 8000 [default 8000]
<7> [510.659448] heartbeat preempt_timeout_ms: 0 [default 0]
<7> [510.659450] heartbeat stop_timeout_ms: 100 [default 100]
<7> [510.659452] heartbeat timeslice_duration_ms: 1 [default 1]
<7> [510.659455] heartbeat Requests:
<7> [510.661821] heartbeat active in queueE e9d3:2* prio=-1024 @ 3011ms: [i915]
<7> [510.661844] heartbeat ring->start: 0x00163000
<7> [510.661847] heartbeat ring->head: 0x00000098
<7> [510.661849] heartbeat ring->tail: 0x000000e8
<7> [510.661851] heartbeat ring->emit: 0x000000f0
<7> [510.661852] heartbeat ring->space: 0x00000f68
<7> [510.661854] heartbeat ring->hwsp: 0xfedfe100