vbatts/grub
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

Preferred resolution detection for VBE.

Browse source 
* grub-core/video/video.c (grub_video_edid_checksum): New function.
(grub_video_edid_preferred_mode): Likewise.  Try EDID followed by
the Flat Panel extension, in line with the X.org VESA driver.
* grub-core/video/i386/pc/vbe.c (grub_vbe_bios_get_flat_panel_info):
New function.
(grub_vbe_bios_get_ddc_capabilities): Likewise.
(grub_vbe_bios_read_edid): Likewise.
(grub_vbe_get_preferred_mode): Likewise.
(grub_video_vbe_setup): When the mode is "auto", try to get the
preferred mode from VBE, and use the largest mode that is no larger
than the preferred mode (some BIOSes expose a preferred mode that is
not in their mode list!).  If this fails, fall back to 640x480 as a
safe conservative choice.
(grub_video_vbe_get_edid): New function.
(grub_video_vbe_adapter): Add get_edid.
* include/grub/video.h (struct grub_vbe_edid_info): New structure.
(struct grub_video_adapter): Add get_edid.
(grub_video_edid_checksum): Add prototype.
(grub_video_edid_preferred_mode): Likewise.
* include/grub/i386/pc/vbe.h (struct grub_vbe_flat_panel_info): New
structure.

* grub-core/commands/videoinfo.c (print_edid): New function.
(grub_cmd_videoinfo): Print EDID if available.

* util/grub.d/00_header.in (GRUB_GFXMODE): Default to "auto".  This
is more appropriate on a wider range of platforms than 640x480.
* docs/grub.texi (Simple configuration): Update GRUB_GFXMODE
documentation.
This commit is contained in:
Colin Watson 2011-07-21 19:46:44 +01:00
commit 8fc4fa45c5
8 changed files with 333 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

3
docs/grub.texi
View file

@ -1203,7 +1203,8 @@ listed in @file{/boot/grub/video.lst}.
Set the resolution used on the @samp{gfxterm} graphical terminal. Note that
you can only use modes which your graphics card supports via VESA BIOS
Extensions (VBE), so for example native LCD panel resolutions may not be
available. The default is @samp{640x480}. @xref{gfxmode}.
available. The default is @samp{auto}, which tries to select a preferred
resolution. @xref{gfxmode}.
@item GRUB_BACKGROUND
Set a background image for use with the @samp{gfxterm} graphical terminal.