Display is unusable with default settings

[Stefan Sonnenberg-Carstens]

Binary package hint: xserver-xorg-driver-trident

1. Edgy thinks my mashine needs a "vesa" driver.
That does not work at all.
2. Edgy creates a standard xorg.conf.
I change the "vesa" driver to trident and the display is ok.
3. If I move windows a bit faster or scroll up and down,
the display becomes mocked up and I need to switch to virtual text
console and back again.
With dapper I added the line
Option "ShadowFB" "On"
to my xorg.conf and everything was fine.
That is no longer possible.
If I do so, the display is not usable at all, it looks somewhat scrambled.

[lspci]
00:00.0 Host bridge: Intel Corporation 82855PM Processor to I/O Controller (rev 03)
01:00.0 VGA compatible controller: Trident Microsystems CyberBlade XP4m32 (rev 91)

[William Grant (wgrant)]

What type of video card do you have?

[Stefan Sonnenberg-Carstens (stefan-sonnenberg)]

lspci:
01:00.0 VGA compatible controller: Trident Microsystems CyberBlade XP4m32 (rev 91)
It sits inside a toshiba portege r100

[David Sterratt (david-c-sterratt)]

I seem to be having some success with the "EXA" acceleration method; see xorg.conf device section below. It seems to be important to have ShadowFB off with EXA enabled.

Section "Device"
        Identifier "Trident Microsystems CyberBlade XP4m32"
        Driver "trident"
        BusID "PCI:1:0:0"
        Option "AccelMethod" "EXA"
        Option "ShadowFB" "false"
EndSection

I've only just started using the trident driver, as I cannot get the vesa driver to work in Edgy. (see https://launchpad.net/distros/ubuntu/+source/xorg/+bug/68814
)

[Stefan Sonnenberg-Carstens (stefan-sonnenberg)]

These settings in xorg.conf work.
Card is usable, X is stable.

[David Sterratt (david-c-sterratt)]

After using these settings for a while, I have noticed one problem. The resolution changes to a very low resolution (so only about a quarter of the screen is visible) when the screen comes back on after the screensaver. I use Ctrl-Alt-F1, pause a bit, Ctrl-Alt-F7 to get back to the proper resolution. Sometimes this seems to cause the machine to freeze, but most of the time not. There is more confirmation of this in this forum post:

http://ubuntuforums.org/showthread.php?p=1842971#post1842971

Another potential problem may be using external projectors. I haven't tried it yet, but it didn't work in previous versions of the trident driver:

http://lists.freedesktop.org/archives/xorg/2005-November/011289.html

[Timo Aaltonen (tjaalton)]

this driver has been removed from Ubuntu, closing it's bugs