On KBL-7500U igt@gem_exec_suspend@basic-s3 fails on CI
https://intel-gfx-ci.01.org/CI/CI_DRM_2306/fi-kbl-7500u/igt@gem_exec_suspend@basic-s3.html

Dmesg: https://intel-gfx-ci.01.org/CI/CI_DRM_2306/fi-kbl-7500u/dmesg-during.log

rtcwake: write error
(gem_exec_suspend:7648) igt-aux-CRITICAL: Test assertion failure function suspend_via_rtcwake, file igt_aux.c:713:
(gem_exec_suspend:7648) igt-aux-CRITICAL: Failed assertion: system(cmd) == 0
(gem_exec_suspend:7648) igt-aux-CRITICAL: This failure means that something is wrong with the rtcwake tool or how your distro is set up. This is not a i915.ko or i-g-t bug.
Subtest basic-S3 failed.
**** DEBUG ****
(gem_exec_suspend:7648) DEBUG: Test requirement passed: gem_has_ring(fd, 0)
(gem_exec_suspend:7648) DEBUG: Test requirement passed: can_mi_store_dword(gen, 0)
(gem_exec_suspend:7648) DEBUG: Test requirement passed: nengine
(gem_exec_suspend:7648) DEBUG: Test requirement passed: gem_has_ring(fd, engine)
(gem_exec_suspend:7648) DEBUG: Test requirement passed: can_mi_store_dword(gen, engine)
(gem_exec_suspend:7648) DEBUG: Test requirement passed: nengine
(gem_exec_suspend:7648) ioctl-wrappers-DEBUG: Test requirement passed: __gem_set_caching(fd, handle, caching) == 0
(gem_exec_suspend:7648) DEBUG: Test requirement passed: __gem_execbuf(fd, &execbuf) == 0
(gem_exec_suspend:7648) DEBUG: Verifying result
(gem_exec_suspend:7648) DEBUG: Test requirement passed: gem_has_ring(fd, engine)
(gem_exec_suspend:7648) DEBUG: Test requirement passed: can_mi_store_dword(gen, engine)
(gem_exec_suspend:7648) DEBUG: Test requirement passed: nengine
(gem_exec_suspend:7648) ioctl-wrappers-DEBUG: Test requirement passed: __gem_set_caching(fd, handle, caching) == 0
(gem_exec_suspend:7648) DEBUG: Test requirement passed: __gem_execbuf(fd, &execbuf) == 0
(gem_exec_suspend:7648) DEBUG: Verifying result
(gem_exec_suspend:7648) DEBUG: Test requirement passed: gem_has_ring(fd, engine)
(gem_exec_suspend:7648) DEBUG: Test requirement passed: can_mi_store_dword(gen, engine)
(gem_exec_suspend:7648) DEBUG: Test requirement passed: nengine
(gem_exec_suspend:7648) ioctl-wrappers-DEBUG: Test requirement passed: __gem_set_caching(fd, handle, caching) == 0
(gem_exec_suspend:7648) DEBUG: Test requirement passed: __gem_execbuf(fd, &execbuf) == 0
(gem_exec_suspend:7648) DEBUG: Verifying result
(gem_exec_suspend:7648) DEBUG: Test requirement passed: gem_has_ring(fd, engine)
(gem_exec_suspend:7648) DEBUG: Test requirement passed: can_mi_store_dword(gen, engine)
(gem_exec_suspend:7648) DEBUG: Test requirement passed: nengine
(gem_exec_suspend:7648) ioctl-wrappers-DEBUG: Test requirement passed: __gem_set_caching(fd, handle, caching) == 0
(gem_exec_suspend:7648) DEBUG: Test requirement passed: __gem_execbuf(fd, &execbuf) == 0
(gem_exec_suspend:7648) DEBUG: Verifying result
(gem_exec_suspend:7648) ioctl-wrappers-DEBUG: Test requirement passed: __gem_set_caching(fd, handle, caching) == 0
(gem_exec_suspend:7648) DEBUG: Test requirement passed: __gem_execbuf(fd, &execbuf) == 0
(gem_exec_suspend:7648) igt-core-DEBUG: Test requirement passed: !igt_run_in_simulation()
(gem_exec_suspend:7648) igt-aux-DEBUG: Test requirement passed: (power_dir = open("/sys/power", O_RDONLY)) >= 0
(gem_exec_suspend:7648) igt-aux-DEBUG: Test requirement passed: get_supported_suspend_states(power_dir) & (1 << state)
(gem_exec_suspend:7648) igt-aux-DEBUG: Test requirement passed: test == SUSPEND_TEST_NONE || faccessat(power_dir, "pm_test", R_OK | W_OK, 0) == 0
(gem_exec_suspend:7648) igt-aux-DEBUG: Test requirement passed: system(cmd) == 0
(gem_exec_suspend:7648) igt-aux-CRITICAL: Test assertion failure function suspend_via_rtcwake, file igt_aux.c:713:
(gem_exec_suspend:7648) igt-aux-CRITICAL: Failed assertion: system(cmd) == 0
(gem_exec_suspend:7648) igt-aux-CRITICAL: This failure means that something is wrong with the rtcwake tool or how your distro is set up. This is not a i915.ko or i-g-t bug.
****  END  ****
Environment	
PIGLIT_PLATFORM="mixed_glx_egl" PIGLIT_SOURCE_DIR="/opt/igt/piglit"
Command	
/opt/igt/tests/gem_exec_suspend --run-subtest basic-S3

Documenting for CI.