Bug 27922 - setting graphics mode for text console with video= instead of vga= does not work
Summary: setting graphics mode for text console with video= instead of vga= does not work
Alias: None
Product: Drivers
Classification: Unclassified
Component: Video(DRI - non Intel) (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: drivers_video-dri
Depends on:
Reported: 2011-01-31 22:35 UTC by Elmar Stellnberger
Modified: 2012-03-05 16:56 UTC (History)
2 users (show)

See Also:
Kernel Version: 2.6.38-0.0.7
Regression: No
Bisected commit-id:


Description Elmar Stellnberger 2011-01-31 22:35:16 UTC
I have stated "video=1920x1200-24@60" on my kernel command line. Instead it initializes a 80x25 text console with a low resolution of sth. like 640x480 or so.

  The video kernel command line is said to be the future replacement of vga= modes by the Xorg development team (vga= is said to be no more compatible with Xorg`s video mode initialization). 

Is it already implemented?
If yes a fallback to a similar Vesa graphics mode with Vesa safe/restore mode on vt-switch may be an additional opportunity.

occurs with and without kernel modesetting.
Comment 1 Felix Miata 2011-03-08 00:16:11 UTC
With radeon rv380 and a P275 Trinitron CRT, video=1024x768 on cmdline instead of vga=0xwhatever or vga=7whatever works for me with default modesetting state and Kulow/openSUSE kernel-desktop- and GA kernel-default- to produce same result on tty[1-6] as vga=791/vga=0x305/vga=0x317/vga=0x318 did before KMS implementation.
Comment 2 Elmar Stellnberger 2012-03-03 16:10:57 UTC
  As far as I have tested it on my machine the radeon module needs to be loaded with KMS enabled (no radeon.modeset=0 parameter) to get the video kernel-cmdline option interpreted (/proc/cmdline). If you f.i. need to use uvesafb instead give the following option: uvesafb.mode_option=1600x1200-24@60 (1920x1200 is no Vesa mode). The same parameters can be given on modeprobe leaving the module name (radeon., uvesafb.) out (/usr/src/linux-ver/Documentation/fb).
Comment 3 Jérôme Glisse 2012-03-05 16:56:01 UTC
This is not a bug, video= command line is only interpreted with kernel modesetting enabled. We don't support anymore non kernel modesetting case for radeon.

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