Re: external crt on i855 laptop

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Hello,

on 02/06/04 21:54, Luca Capello wrote:
> In order to use the CRT, this *must* be connected when X starts and you
> should 'startx' from a console *on* the CRT (I mean, boot on console,
> switch to CRT with Fn+F8 and then log in and 'startx').
well, this isn't completely correct: in fact, when I come at work, I
just switch to the CRT with Fn+F8 when the 'lilo menu' appears and
automatically I get my GNOME 2.4 at 1600x1200 on the external CRT.

I made more and deeper tests, here the results...

- - using the 'vesafb' or 'nofb' for the console doesn't change the
behaviour of 'i810switch', which enables the CRT, but the screen on CRT
is flow and you can't use it

- - 'fbdev' driver on X
- ----------------------
let me correctly switch with Fn+F8, but the screen isn't usable at all,
due to the fact that you've only a set of colors (purple and some red
and green).

- - 'vesa' driver on X
- ---------------------
1) if I 'startx' from LCD, with Fn+F8 I can successfully switch to
CRT@1024x768 and the contrary without no 'top-garbage' bands or
something similar. This isn't the case for 800x600 or 640x480, where the
screen is unusable: I get a lot of lines coming from all the windows
I've opened on GNOME 2.4.

2) if I 'startx' from the CRT, however, I can't swtich to LCD with
Fn+F8, as I get no screen or a lot of garbage/lines coming from the
other windows (actually, the behaviour varies with the resolution I've
on the CRT before switching). In this case, switching to a console and
then back to X solves the problem.

- - 'i810' driver on X
- ---------------------
Even if I 'startx' from LCD, I get the problem described by Lieven Buts:
======
on 02/05/04 09:02, Lieven Buts wrote:
> When I use the Fn-F8 key combination to switch between the on-board
LCD and
> the external monitor on the VGA port, the entire display moves down by
about
> 50 pixels, and the upper band of the screen is filled with garbage.
The mouse
> cursor doesn't move with the screen contents, leaving it out of vertical
> sync. Switching to a text console (Ctrl-Alt-F1) and back (Alt-F7)
restores
> the display to normal.
======

So, IMHO there're 2 problems:
- - one is the Fn+F8 switch, I mean, we can't have LCD > CRT > LCD+CRT.
This is strange, because IIRC an ASUS M2N user privately reported me
that he can use LCD+CRT on his machine (which is quite the same as the
ASUS M3N, Intel Centrino + Intel 82855GM). I can dig in my mail archive
to find out that user and his mail, if necessary.

- - the other problem is the 'i810' X driver, which doesn't let you switch
to CRT and the contrary (while with the 'vesa' driver you can).

Possible solutions?

Thx, bye,
Gismo / Luca
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