From 3e8c338bfab12864a076fdd3397cc938adcd8cb7 Mon Sep 17 00:00:00 2001 From: Peter Jones Date: Wed, 4 Mar 2020 12:58:50 +0100 Subject: [PATCH] efi/gop: Add debug output on GOP probing Add debug information to EFI GOP video driver probing function. Signed-off-by: Peter Jones Signed-off-by: Javier Martinez Canillas Reviewed-by: Daniel Kiper --- grub-core/video/efi_gop.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/grub-core/video/efi_gop.c b/grub-core/video/efi_gop.c index c9e40e8d4..be446f8d2 100644 --- a/grub-core/video/efi_gop.c +++ b/grub-core/video/efi_gop.c @@ -71,7 +71,10 @@ check_protocol (void) handles = grub_efi_locate_handle (GRUB_EFI_BY_PROTOCOL, &graphics_output_guid, NULL, &num_handles); if (!handles || num_handles == 0) - return 0; + { + grub_dprintf ("video", "GOP: no handles\n"); + return 0; + } for (i = 0; i < num_handles; i++) { @@ -81,6 +84,7 @@ check_protocol (void) grub_video_gop_iterate (check_protocol_hook, &have_usable_mode); if (have_usable_mode) { + grub_dprintf ("video", "GOP: found usable mode\n"); grub_free (handles); return 1; } @@ -89,6 +93,8 @@ check_protocol (void) gop = 0; gop_handle = 0; + grub_dprintf ("video", "GOP: no usable mode\n"); + return 0; }