External CRT clone with i810 driver - Debian

This is a discussion on External CRT clone with i810 driver - Debian ; Hi, I was just wondering about the best way to clone the LCD display of my laptop onto an external CRT. I have an i855GM graphic chipset and I use the i810 driver. I had it worked using i855crt[1] but ...

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  1. External CRT clone with i810 driver

    Hi,

    I was just wondering about the best way to clone the LCD display of my
    laptop onto an external CRT. I have an i855GM graphic chipset and I
    use the i810 driver.

    I had it worked using i855crt[1] but overlay does not work. The
    documentation of i855crt contains a patch against XFree86 source code
    to have overlay work.

    There is also a bug[2] on the xserver-xfree86 package about this.

    Looking at the xorg svn web interface, it appears some parts of the
    patch have been included.

    Following this, I have several questions :

    Is i855crt deprecated since the inclusion of X.org in Debian?
    Is there an X way to have the external CRT clone the LCD display?
    Should bug #285818 be closed?

    Thanks in advance for any clue!

    [1] http://i855crt.sourceforge.net
    [2] http://bugs.debian.org/285818

  2. Re: External CRT clone with i810 driver

    On Thursday 01 September 2005 14.51, Alexandre Rossi wrote:
    > I was just wondering about the best way to clone the LCD display of my
    > laptop onto an external CRT. I have an i855GM graphic chipset and I
    > use the i810 driver.
    >
    > I had it worked using i855crt[1] but overlay does not work. The
    > documentation of i855crt contains a patch against XFree86 source code
    > to have overlay work.
    >
    > There is also a bug[2] on the xserver-xfree86 package about this.
    >
    > Looking at the xorg svn web interface, it appears some parts of the
    > patch have been included.


    Yes, they were. I have upgraded to X.Org for this reason. I tried to use
    i855crt to switch between the modes, but I had some problems (but I don't
    remember the exact details). Switching modes using the keys Fn+F5 (on my
    notebook) stopped to work completely (before with XFree86 it worked but I
    got garbage).

    What worked for me is to add this to my xorg.conf:
    Section "Device"
    Identifier "Generic Video Card"
    Driver "i810"
    Option "MonitorLayout" "CRT,LFP"
    Option "Clone" "true"
    EndSection

    This works giving me cloned output on the laptop and CRT. Overlay only
    works outputs to the laptop, but it can be changed using xv_attr utility
    (so you can watch films from a projector

    My only problem with this setup is that CRT output is always on. But it is
    not really a problem for me. I was hoping to use i855crt to switch between
    modes, but it did not work perfectly. I don't remember what was the
    problem exactly.

    > Following this, I have several questions :
    >
    > Is i855crt deprecated since the inclusion of X.org in Debian?

    I am not sure since switching with Fn+F5 does not work it would be nice to
    make i855crt work with it.

    > Should bug #285818 be closed?


    It definitely needs some updating

    Regards
    Zsolt


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