Print a warning if a user-specifed display mode is not supported by the display pipeline. Users specified the display mode on the kernel command line with the use of the video= parameter. Setting an unsupported mode will leave the console blank, so we should at least let the user know why.
Signed-off-by: Thomas Zimmermann tzimmermann@suse.de --- drivers/gpu/drm/drm_modes.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index 14b746f7ba97..40b7b245e98c 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -1328,6 +1328,10 @@ void drm_mode_prune_invalid(struct drm_device *dev, list_for_each_entry_safe(mode, t, mode_list, head) { if (mode->status != MODE_OK) { list_del(&mode->head); + if (mode->type & DRM_MODE_TYPE_USERDEF) { + drm_warn(dev, "User-defined mode not supported: " + DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); + } if (verbose) { drm_mode_debug_printmodeline(mode); DRM_DEBUG_KMS("Not using %s mode: %s\n",