Bug 27922

Summary:	setting graphics mode for text console with video= instead of vga= does not work
Product:	Drivers	Reporter:	Elmar Stellnberger (estellnb)
Component:	Video(DRI - non Intel)	Assignee:	drivers_video-dri
Status:	RESOLVED INVALID
Severity:	normal	CC:	glisse, mrmazda
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.38-0.0.7	Subsystem:
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-2.6.37.2-3 and GA kernel-default-2.6.37.1-1.2 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.