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Re: [PATCH] Video mode fixes in linux loader
From: |
Robert Millan |
Subject: |
Re: [PATCH] Video mode fixes in linux loader |
Date: |
Sat, 2 May 2009 13:31:14 +0200 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Mon, Apr 13, 2009 at 07:20:20PM -0400, Pavel Roskin wrote:
> > We could detect this situation by checking video= parameter, and setting
> > text mode if intelfb is found. But then again do we want to prevent
> > future versions of intelfb from gracefuly transitioning from vesa mode
> > without screen glitch?
>
> No, that would be bad. It's even possible that intelfb would work
> correctly in other configurations. The laptop has resolution 1440x900
> that doesn't match any VESA mode.
Alright.
> > > Some
> > > kernels may not support VESA modes at all.
> >
> > I don't think this is applicable; all modern versions of Linux include
> > vesa modesetting in its 16-bit entry code, and older versions are already
> > detected by the new loader (user is prompted to use linux16).
>
> I can disable CONFIG_FB, and then the screen remains blank until X
> starts. It's entirely possible that some distros don't enable CONFIG_FB
> to save memory, and I don't always enable it in the kernels I configure
> myself.
Makes sense for official GRUB.
However, I'd still like to add a macro check that can be enabled on distros
that ship Linux builds with CONFIG_FB and want to enable seamless mode
transition (this will be the case for e.g. Debian).
> > > "vga=ask" is not a warning now. It causes "error: You need to load the
> > > kernel first", apparently from initrd. In other words, the "linux"
> > > command fails and there is no visible warning.
> >
> > Sounds like my error code is wrong, but we could turn it into a warning
> > like you suggested.
>
> I was editing the command line from the menu, so I could not see the
> message. Waiting for input is a fair game for an option that implies
> waiting for input.
Spot on. Will do that.
--
Robert Millan
The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
how) you may access your data; but nobody's threatening your freedom: we
still allow you to remove your data and not access it at all."
- Re: [PATCH] Video mode fixes in linux loader,
Robert Millan <=
- Re: [PATCH] Video mode fixes in linux loader, Robert Millan, 2009/05/02
- Re: [PATCH] Video mode fixes in linux loader, BandiPat, 2009/05/02
- Re: [PATCH] Video mode fixes in linux loader, Robert Millan, 2009/05/03
- Re: [PATCH] Video mode fixes in linux loader, BandiPat, 2009/05/04
- Re: [PATCH] Video mode fixes in linux loader, Robert Millan, 2009/05/04
- Re: [PATCH] Video mode fixes in linux loader, BandiPat, 2009/05/04
- Re: [PATCH] Video mode fixes in linux loader, Felix Zielcke, 2009/05/04
- Re: [PATCH] Video mode fixes in linux loader, Robert Millan, 2009/05/04
- Re: [PATCH] Video mode fixes in linux loader, BandiPat, 2009/05/04
- Re: [PATCH] Video mode fixes in linux loader, Robert Millan, 2009/05/13