<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [CI][BAT] igt@pm_rpm@(module-reload|basic-rte) - fail - Failed assertion: setup_environment()" href="https://bugs.freedesktop.org/show_bug.cgi?id=108800#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [CI][BAT] igt@pm_rpm@(module-reload|basic-rte) - fail - Failed assertion: setup_environment()" href="https://bugs.freedesktop.org/show_bug.cgi?id=108800">bug 108800</a> from <a class="email" href="mailto:vanshidhar.r.konda@intel.com" title="Vanshidhar Konda <vanshidhar.r.konda@intel.com>"> Vanshidhar Konda</a> <pre>This test seems to fail mostly on the BSW and BYT systems. Here's the observations I've made so far: 1) The kernel device usage count for suspending the device is higher (+1) in the failed execution of the test than the successful execution. 2) When the test disables all screens (through modeset) power-wells in the display domain are being turned off - except the display and always-on power-wells. 3) In the failed case, there is a difference in the wakeref acquire/release log. The following wakerefs don't happen for the successful executions. Wakeref last acquired: intel_display_power_get+0x18/0x50 [i915] intel_power_domains_init_hw+0x90/0x500 [i915] intel_power_domains_resume+0x3d/0x70 [i915] i915_pm_resume_early+0x9d/0x130 [i915] dpm_run_callback+0x64/0x280 device_resume_early+0xa6/0xe0 async_resume_early+0x14/0x40 async_run_entry_fn+0x34/0x160 Wakeref last released: i915_drm_suspend_late+0xad/0x120 [i915] dpm_run_callback+0x64/0x280 __device_suspend_late+0xad/0x140 async_suspend_late+0x15/0x90 async_run_entry_fn+0x34/0x160 process_one_work+0x245/0x610 worker_thread+0x37/0x380 kthread+0x119/0x130 Possible reasons for failure: The display and always-on power-wells have a higher reference count than the rest of the power-wells in the display domain. Next steps: 1) Confirm that the reference count on display and always-on power-wells is different between test fail/success case. 2) If confirmed, try to figure out the reason for extra reference count on the power-wells in question.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>