[Bug 101403] [IGT] gpu couldn't recovery after running drv_hangman in dom0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101403

--- Comment #8 from XiongZhang <xiong.y.zhang at intel.com> ---
drv_hangman couldn't be finished in text mode and gpu couldn't recovery:
tests# ./drv_hangman
IGT-Version: 1.18-gd1ea0c0 (x86_64) (Linux: 4.12.0-rc4nightly+ x86_64)
Subtest error-state-sysfs-entry: SUCCESS (0.000s)
Subtest error-state-basic: SUCCESS (0.013s)
Subtest error-state-capture-render: SUCCESS (9.891s)
Subtest error-state-capture-bsd: SUCCESS (6.016s)
Test requirement not met in function test_error_state_capture, file
drv_hangman.c:186:
Test requirement: gem_has_ring(device, ring_id)
Subtest error-state-capture-bsd1: SKIP (0.000s)
Test requirement not met in function test_error_state_capture, file
drv_hangman.c:186:
Test requirement: gem_has_ring(device, ring_id)
Subtest error-state-capture-bsd2: SKIP (0.000s)
Subtest error-state-capture-blt: SUCCESS (5.983s)
Subtest error-state-capture-vebox: SUCCESS (6.016s)
Subtest hangcheck-unterminated: SUCCESS (15.999s)

cursor flicker forever and couldn't exit to normal console where I could input
command.

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