<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [KBL] Video corrupted during playback with audio in KBL NUC using Clear Linux OS (Root Caused to GuC/HuC Firmware Authentication Issue)" href="https://bugs.freedesktop.org/show_bug.cgi?id=110617#c5">Comment # 5</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [KBL] Video corrupted during playback with audio in KBL NUC using Clear Linux OS (Root Caused to GuC/HuC Firmware Authentication Issue)" href="https://bugs.freedesktop.org/show_bug.cgi?id=110617">bug 110617</a> from <a class="email" href="mailto:lakshminarayana.vudum@intel.com" title="Lakshmi <lakshminarayana.vudum@intel.com>"> Lakshmi</a> <pre>(In reply to Jon Ewins from <a href="show_bug.cgi?id=110617#c3">comment #3</a>) > GuC and HuC are closed source signed binaries. They are loaded, with the > GuC first authenticated based on its embedded key and the GuC then > supporting authentication of the HuC. Of the kernel params you mentioned, > i915.enable_guc=0x02 configures the system for use of the HuC. The nuclear > flip param should not be relevant. > One observation is that the kernel in use here appears to have late uc > loading (i915_gem_init_hw_late) that was required for Android boot > operation, but never part of the upstream kernel. It is not clear if that is > related. > * Please confirm that HuC authentication is successful on APL, not just that > no video corruption is seen. Mihgt be case if case media operation is > different on APL. > > * Is the guc/huc failure consistent on every run? > > Note that we have confirmed locally that current drm-tip kernel with v32.0.3 > GuC fw is not showing an issue for KBL on general boot, IGT tests. > > To aid further debugging, please enable following logging. > First ensure the drm i915 debug level is set > drm.debug=0xe > For GUC logs, set: > i915.guc_log_level=3 > This requires that debugfs is configured. GuC logs will be located after > the test run at: > /sys/kernel/debug/dri/0/i915_guc_log_dump > (no debugfs must be enabled) > If an issue happens in guc load such that the driver load fails, the driver > will copy the log to > /sys/kernel/debug/dri/0/i915_guc_load_err_log_dump > before the driver is unrolled. > please update the content of these files to this bugzilla, along with kernel > dmesg log. Reporter, can you please provide all necessary details as requested above.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>