Tests failing on Alpine/edge: RealKMSOutputTest.drm_set_gamma*

[AlanGriffiths]

Recent PRs are failing on Alpine/edge with:

  71/244 Test  #71: mir_unit_tests_gbm-kms.RealKMSOutputTest.* ...............................................***Failed    0.40 sec
LD_LIBRARY_PATH=/spread/mir/spread/build/build/bin/../lib/
Running main() from main.cpp
Note: Google Test filter = RealKMSOutputTest.*:-:--
[==========] Running 12 tests from 1 test suite.
[----------] Global test environment set-up.
[----------] 12 tests from RealKMSOutputTest
[ RUN ] RealKMSOutputTest.operations_use_existing_crtc
[ OK ] RealKMSOutputTest.operations_use_existing_crtc (0 ms)
[ RUN ] RealKMSOutputTest.operations_use_possible_crtc
[ OK ] RealKMSOutputTest.operations_use_possible_crtc (0 ms)
[ RUN ] RealKMSOutputTest.set_crtc_failure_is_handled_gracefully
[2023-08-24 09:25:54.647503] < - ERROR - > gbm-kms: Failed to set CRTC: No error information (-1)
[2023-08-24 09:25:54.647538] < - ERROR - > gbm-kms: Output VGA-0 has no associated CRTC to schedule page flips on
[ OK ] RealKMSOutputTest.set_crtc_failure_is_handled_gracefully (8 ms)
[ RUN ] RealKMSOutputTest.clear_crtc_gets_crtc_if_none_is_current
[ OK ] RealKMSOutputTest.clear_crtc_gets_crtc_if_none_is_current (0 ms)
[ RUN ] RealKMSOutputTest.clear_crtc_does_not_throw_if_no_crtc_is_found
[ OK ] RealKMSOutputTest.clear_crtc_does_not_throw_if_no_crtc_is_found (0 ms)
[ RUN ] RealKMSOutputTest.cursor_move_permission_failure_is_non_fatal
[2023-08-24 09:25:54.656671] < -warning- > gbm-kms: move_cursor: drmModeMoveCursor failed (Permission denied)
[ OK ] RealKMSOutputTest.cursor_move_permission_failure_is_non_fatal (0 ms)
[ RUN ] RealKMSOutputTest.cursor_set_permission_failure_is_non_fatal
[2023-08-24 09:25:54.657269] < -warning- > gbm-kms: set_cursor: drmModeSetCursor failed (Permission denied)
[ OK ] RealKMSOutputTest.cursor_set_permission_failure_is_non_fatal (0 ms)
[ RUN ] RealKMSOutputTest.has_no_cursor_if_no_hardware_support
[2023-08-24 09:25:54.657761] < -warning- > gbm-kms: set_cursor: drmModeSetCursor failed (No such device or address)
[ OK ] RealKMSOutputTest.has_no_cursor_if_no_hardware_support (0 ms)
[ RUN ] RealKMSOutputTest.clear_crtc_is_non_fatal_on_permission_error
[2023-08-24 09:25:54.658227] <information> gbm-kms: Couldn't clear output VGA-0 (drmModeSetCrtc: Permission denied (13))
[2023-08-24 09:25:54.658266] <information> gbm-kms: Couldn't clear output VGA-0 (drmModeSetCrtc: Operation not permitted (1))
[ OK ] RealKMSOutputTest.clear_crtc_is_non_fatal_on_permission_error (0 ms)
[ RUN ] RealKMSOutputTest.clear_crtc_throws_if_drm_call_fails_for_non_permission_reason
[ OK ] RealKMSOutputTest.clear_crtc_throws_if_drm_call_fails_for_non_permission_reason (0 ms)
[ RUN ] RealKMSOutputTest.drm_set_gamma
/spread/mir/tests/unit-tests/platforms/gbm-kms/kms/test_real_kms_output.cpp:516: Failure
Actual function call count doesn't match EXPECT_CALL(mock_drm, drmModeCrtcSetGamma(drm_fd, crtc_ids[0], gamma.red.size(), const_cast<uint16_t*>(gamma.red.data()), const_cast<uint16_t*>(gamma.green.data()), const_cast<uint16_t*>(gamma.blue.data())))...
Expected: to be called once
Actual: never called - unsatisfied and active

[ FAILED ] RealKMSOutputTest.drm_set_gamma (0 ms)
[ RUN ] RealKMSOutputTest.drm_set_gamma_failure_does_not_throw
/spread/mir/tests/unit-tests/platforms/gbm-kms/kms/test_real_kms_output.cpp:545: Failure
Actual function call count doesn't match EXPECT_CALL(mock_drm, drmModeCrtcSetGamma(drm_fd, crtc_ids[0], gamma.red.size(), const_cast<uint16_t*>(gamma.red.data()), const_cast<uint16_t*>(gamma.green.data()), const_cast<uint16_t*>(gamma.blue.data())))...
Expected: to be called once
Actual: never called - unsatisfied and active

[ FAILED ] RealKMSOutputTest.drm_set_gamma_failure_does_not_throw (0 ms)
[----------] 12 tests from RealKMSOutputTest (14 ms total)

[----------] Global test environment tear-down
[==========] 12 tests from 1 test suite ran. (14 ms total)
[ PASSED ] 10 tests.
[ FAILED ] 2 tests, listed below:
[ FAILED ] RealKMSOutputTest.drm_set_gamma
[ FAILED ] RealKMSOutputTest.drm_set_gamma_failure_does_not_throw

2 FAILED TESTS