Hello Thomas, Hope you are doing well. This mail is regarding a regression we are seeing in our CI runs[1] on linux-next repository. Since the version next-20240506 [2], we are seeing the following regression ````````````````````````````````````````````````````````````````````````````````` Starting dynamic subtest: gt_contexts (i915_selftest:1107) igt_kmod-WARNING: i915: Unknown symbol acpi_video_unregister (err -2) (i915_selftest:1107) igt_kmod-WARNING: i915: Unknown symbol acpi_video_register_backlight (err -2) (i915_selftest:1107) igt_kmod-WARNING: i915: Unknown symbol __acpi_video_get_backlight_type (err -2) (i915_selftest:1107) igt_kmod-WARNING: i915: Unknown symbol acpi_video_register (err -2) (i915_selftest:1107) igt_kmod-CRITICAL: Test assertion failure function igt_kselftest_execute, file ../../../usr/src/igt-gpu-tools/lib/igt_kmod.c:1594: (i915_selftest:1107) igt_kmod-CRITICAL: Failed assertion: err == 0 (i915_selftest:1107) igt_kmod-CRITICAL: kselftest "i915 igt__23__live_gt_contexts=1 live_selftests=-1 disable_display=1 st_filter=" failed: No such file or directory [2] Dynamic subtest gt_contexts failed. ````````````````````````````````````````````````````````````````````````````````` Details log can be found in [3]. After bisecting the tree, the following patch [4] seems to be the first "bad" commit ````````````````````````````````````````````````````````````````````````````````````````````````````````` 2fd001cd36005846caa6456fff1008c6f5bae9d4 is the first bad commit commit 2fd001cd36005846caa6456fff1008c6f5bae9d4 Author: Thomas Zimmermann tzimmermann@xxxxxxx Date: Fri Mar 29 21:32:12 2024 +0100 arch: Rename fbdev header and source files ````````````````````````````````````````````````````````````````````````````````````````````````````````` We also verified that if we revert the patch the issue is not seen. Could you please check why the patch causes this regression and provide a fix if necessary? Thank you. Regards Chaitanya [1] https://intel-gfx-ci.01.org/tree/linux-next/combined-alt.html? [2] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20240506 [3] https://intel-gfx-ci.01.org/tree/linux-next/next-20240506/bat-mtlp-9/igt@i915_selftest@live@gt_contexts.html [4] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20240506&id=2fd001cd36005846caa6456fff1008c6f5bae9d4 ;