tty open screws X color palette

tty open screws X color palette

[Olaf Hering]

An 'echo foo > /dev/tty42' while X runs will screw the color palette, if
tty42 wasnt in use before. Tested on ibook G3 and G4.
This will happen with rage128 and radeonfb in 2.6.5 and later,
X version is 4.3.99.

X runs usually with a different color depth than the kernel framebuffer
console.
How can this be fixed? tty open should not touch the hardware if the tty
is not active.


-- 
USB is for mice, FireWire is for men!

sUse lINUX ag, nÃœRNBERG


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Re: tty open screws X color palette

[Antonino A. Daplas]

On Friday 13 August 2004 19:47, Olaf Hering wrote:
> An 'echo foo > /dev/tty42' while X runs will screw the color palette, if
> tty42 wasnt in use before. Tested on ibook G3 and G4.
> This will happen with rage128 and radeonfb in 2.6.5 and later,
> X version is 4.3.99.
>
> X runs usually with a different color depth than the kernel framebuffer
> console.
> How can this be fixed? tty open should not touch the hardware if the tty
> is not active.

I tried the above and nothing happens to X.  My setup is X86 nVidia AGP
on rivafb linux-2.6.8-rc4-mm1.

There are a bunch of framebuffer patches in rc4-mm1, perhaps those will
help.  Otherwise, it's probably a driver or arch specific problem.

Tony




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Re: tty open screws X color palette

[Olaf Hering]

 On Wed, Sep 15, Antonino A. Daplas wrote:

> On Friday 13 August 2004 19:47, Olaf Hering wrote:
> > An 'echo foo > /dev/tty42' while X runs will screw the color palette, if
> > tty42 wasnt in use before. Tested on ibook G3 and G4.
> > This will happen with rage128 and radeonfb in 2.6.5 and later,
> > X version is 4.3.99.
> >
> > X runs usually with a different color depth than the kernel framebuffer
> > console.
> > How can this be fixed? tty open should not touch the hardware if the tty
> > is not active.
> 
> I tried the above and nothing happens to X.  My setup is X86 nVidia AGP
> on rivafb linux-2.6.8-rc4-mm1.

Do you have 'Option "usefbdev" "true"' in our XF86Config?

-- 
USB is for mice, FireWire is for men!

sUse lINUX ag, nÃœRNBERG


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Re: tty open screws X color palette

[Antonino A. Daplas]

On Sunday 15 August 2004 14:32, Olaf Hering wrote:
>  On Wed, Sep 15, Antonino A. Daplas wrote:
> > On Friday 13 August 2004 19:47, Olaf Hering wrote:
> > > An 'echo foo > /dev/tty42' while X runs will screw the color palette,
> > > if tty42 wasnt in use before. Tested on ibook G3 and G4.
> > > This will happen with rage128 and radeonfb in 2.6.5 and later,
> > > X version is 4.3.99.
> > >
> > > X runs usually with a different color depth than the kernel framebuffer
> > > console.
> > > How can this be fixed? tty open should not touch the hardware if the
> > > tty is not active.
> >
> > I tried the above and nothing happens to X.  My setup is X86 nVidia AGP
> > on rivafb linux-2.6.8-rc4-mm1.
>
> Do you have 'Option "usefbdev" "true"' in our XF86Config?

No.  I tried that option before but it produces a segfault.

Tony




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