Re: VESA fb console in 2.6.15

[Bill Davidsen <davidsen@tmr.com>]

Antonino A. Daplas wrote:
> Andrew Morton wrote:
>
> > Damien Wyart <damien.wyart@gmail.com> wrote:
> >
> > > > > I've noticed in several versions of 2.6.15 that VESA fb console
> > > > > seems completely broken : it draws screen in several very slow
> > > > > steps, making the whole display almos unusable. And it crashes
> > > > > *very* often, for example when switching to X. The computer is
> > > > > complety locked, and doesn't even respond to SysRQ.
> > > > > I use vga=0x31B as boot param.
> > >
> > > * "Antonino A. Daplas" <adaplas@gmail.com> [051122 01:28]:
> > >
> > >
> > > > Try booting with:
> > > > vga=0x31b video=vesafb:mtrr:3
> > >
> > > Thanks, this works fine with this param and also without any video=
> > > param. I had a default video=vesafb:mtrr:2 in my grub conf file because
> > > of mtrr problems a few kernel versions earlier (had been discussed
> > > extensively on this list). This setting doesn't work well in 2.6.15.
> >
> > Does 2.6.15-rc? work OK without any special boot options? (We want it to..)
>
>
> From what I understand, before this, he needs video=vesafb:mtrr:2. (Because
> his machine defaults to write-back mtrr instead of write-combining). Now it
> works without any special boot options because I made vesafb default to
> nomtrr because of problems like this and conflicts with X/DRI.
Thank you, I bet this fixes a problem I was having with a system which 
sometimes came up with video problems unless I used an mtrr parameter.
--
   -bill davidsen (davidsen@tmr.com)
"The secret to procrastination is to put things off until the
 last possible moment - but no longer"  -me

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