Xen users - May 2008 - xen "vga=" console mode set in ubuntu /boot/grub/menu.lst is ignored

i''ve nominal ubuntu 804 installed as a xen 320 Dom0,

	Linux server 2.6.24-16-xen #1 SMP Thu Apr 10 14:35:03 UTC 2008 x86_64 GNU/Linux

i''m trying to setup the console video mode that xen uses, but am
failing to do so.

presuming,

	# VESA video modes (VGA codes):
	        640x480 800x600 1024x768 1280x1024 1600x1200 Ask user at boot.
	8 bits  vga=769 vga=771 vga=773  vga=775   vga=796   vga=ask
	16 bits vga=785 vga=788 vga=791  vga=794   vga=798   vga=ask
	32 bits vga=786 vga=789 vga=792  vga=795   vga=799   vga=ask

which seems to be backed up by,

	http://slackware.osuosl.org/slackware-3.3/docs/linux-2.0.30/svga.txt

i edit "/boot/grub/menu.lst" to

	### BEGIN AUTOMAGIC KERNELS LIST
	...
	# xenhopt=dom0_mem=512M noirqdebug vga=775
	# xenkopt=max_loop=64 console=tty0 console=ttyS0,115200n8
	...

then, a subsequent

	update-grub

re-generates "/boot/grub/menu.lst" to contain,

	title       Xen 3.2 / Ubuntu 8.04, kernel 2.6.24-16-xen
	root        (hd0,0)
	kernel      /xen-3.2.gz dom0_mem=512M noirqdebug vga=775
	module      /vmlinuz-2.6.24-16-xen ro
root=/dev/mapper/VG_Dom0-LV_ROOT max_loop=64 console=tty0
console=ttyS0,115200n8
	module      /initrd.img-2.6.24-16-xen

on reboot,  @console Xen begins to dsiplay its output, but stops at

	press <RETURN> to see video modes
	<SPACE> to continue, or wait 30 sec

here i can select any of the offered video modes, and boot continues
in the selected video mode.

or, i can wait 30 sec, and vid mode defaults to 80x25 text, and boot continues.

i just can''t get the mode to ''stick'' to what i set in
menu.lst.

any ideas? something wrong/additional needed in config?

thanks!

_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

I tried playing with these under a late RC of Xen 3.2.0, i.e. setting my
terminal to a static vga mode or a static number of lines (50, 60) and found
it to be horribly broken - this on an Asus DSBV-DX board with the XGI video
chip.  Nothing seemed to work except a lines setting of 50 or 60 (can''t
remember which) gave me 30 something lines of text; none of the VGA modes
worked properly under the Xen kernel, yet no problem under the CentOS
5.1 supplied kernel.  FYI, the video modes referenced in the kernel''s
vga.txt document are _not_ supported on a 1 to 1 basis under Xen; look at
the source code for supported modes.  If you can''t find them, try
reasking
on xen-devel and I''m sure Kier can spout them off the top of his head. 
As
far as I could tell at the time, he was the last committer to mess with
screen modes.

-Ray


On 5/17/08, snowcrash+xen@gmail.com <snowcrash%2Bxen@gmail.com> <
schneecrash+xen@gmail.com <schneecrash%2Bxen@gmail.com>>
wrote:
>
> i''ve nominal ubuntu 804 installed as a xen 320 Dom0,
>
>        Linux server 2.6.24-16-xen #1 SMP Thu Apr 10 14:35:03 UTC 2008
> x86_64 GNU/Linux
>
> i''m trying to setup the console video mode that xen uses, but am
> failing to do so.
>
> presuming,
>
>        # VESA video modes (VGA codes):
>                640x480 800x600 1024x768 1280x1024 1600x1200 Ask user at
> boot.
>        8 bits  vga=769 vga=771 vga=773  vga=775   vga=796   vga=ask
>        16 bits vga=785 vga=788 vga=791  vga=794   vga=798   vga=ask
>        32 bits vga=786 vga=789 vga=792  vga=795   vga=799   vga=ask
>
> which seems to be backed up by,
>
>
> http://slackware.osuosl.org/slackware-3.3/docs/linux-2.0.30/svga.txt
>
> i edit "/boot/grub/menu.lst" to
>
>        ### BEGIN AUTOMAGIC KERNELS LIST
>        ...
>        # xenhopt=dom0_mem=512M noirqdebug vga=775
>        # xenkopt=max_loop=64 console=tty0 console=ttyS0,115200n8
>        ...
>
> then, a subsequent
>
>        update-grub
>
> re-generates "/boot/grub/menu.lst" to contain,
>
>        title       Xen 3.2 / Ubuntu 8.04, kernel 2.6.24-16-xen
>        root        (hd0,0)
>        kernel      /xen-3.2.gz dom0_mem=512M noirqdebug vga=775
>        module      /vmlinuz-2.6.24-16-xen ro
> root=/dev/mapper/VG_Dom0-LV_ROOT max_loop=64 console=tty0
> console=ttyS0,115200n8
>        module      /initrd.img-2.6.24-16-xen
>
> on reboot,  @console Xen begins to dsiplay its output, but stops at
>
>        press <RETURN> to see video modes
>        <SPACE> to continue, or wait 30 sec
>
> here i can select any of the offered video modes, and boot continues
> in the selected video mode.
>
> or, i can wait 30 sec, and vid mode defaults to 80x25 text, and boot
> continues.
>
> i just can''t get the mode to ''stick'' to what i
set in menu.lst.
>
> any ideas? something wrong/additional needed in config?
>
> thanks!
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>

_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

ray,
> none of the VGA modes worked properly under the Xen kernel, yet no problem
> under the CentOS 5.1 supplied kernel.
testing, i can also now reproduce the problem on an opensuse 11-beta3 install.

but, as you''ve found, on a vanilla centos51 install, no issues (at
least not with the VGA modes ...)

so, looks like something in xen 32x''s changed ...
> try reasking on xen-devel and I''m sure Kier can spout them off the
top of his
> head.  As far as I could tell at the time, he was the last committer to
mess with
> screen modes
rather than move this thread, i''ll keep it here, and copy him.

thanks for the heads-up!

_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

On 20/5/08 14:39, "snowcrash+xen@gmail.com"
<schneecrash+xen@gmail.com>
wrote:
>> try reasking on xen-devel and I''m sure Kier can spout them off
the top of his
>> head.  As far as I could tell at the time, he was the last committer to
mess
>> with
>> screen modes
> 
> rather than move this thread, i''ll keep it here, and copy him.
> 
> thanks for the heads-up!
Hey, I''m not on xen-users. Please post a new thread on xen-devel with a
clear explanation of the problem for those who haven''t seen the
xen-users
context.

 Cheers,
 Keir



_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

On Tue, May 20, 2008 at 6:55 AM, Keir Fraser <keir.fraser@eu.citrix.com>
wrote:
> Hey, I''m not on xen-users. Please post a new thread on xen-devel
with a
> clear explanation of the problem for those who haven''t seen the
xen-users
> context.
done. ''over there'', now ...

_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users