mactel-support team mailing list archive

[Kehan Harman <kehanharman@xxxxxxxxx>]

I have similar problems and even the same resolution external screen.
Disabling desktop-effects (compiz) does fix most of the problems but
there are still a few issues. I also didn't get the errors about virtual
resolution being too small if I placed the macbook screen below my other
screen rather than next to it (actually quite effective - you just need
to make sure your other screen is high enough off the desk).

If I leave a window unattended for a few minutes suddenly the characters
start appearing quite strange (I've attached a screenshot). Looking into
ways of fixing this.

** Attachment added: "Screenshot of pixelation"
   http://launchpadlibrarian.net/20341916/macbook-pixelation

-- 
dualhead with "gnome-display-properties" on MacBook 4,1 does not work
https://bugs.launchpad.net/bugs/289566
You received this bug notification because you are a member of Mactel
Support, which is the registrant for Mactel Support.

Status in Mactel Support: New
Status in “xserver-xorg-video-intel” source package in Ubuntu: Confirmed

Bug description:
Binary package hint: xserver-xorg-video-intel

Hardware:

~$ sudo dmidecode -s system-product-name
MacBook4,1

Linux: Ubuntu 8.10 RC

A dualhead configuration with xserver-xorg-video-intel 2:2.4.1-1ubuntu10 does not work. I have tested it with "gnome-display-properties", from gnome 2.24.


I used three different xorg.conf, but none of them
lead to a real split screen configuration:


-----------------------------------------------------------------------

1.) The default xorg.conf after installation:

[CODE]

Section "Monitor"
	Identifier	"Configured Monitor"
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Monitor		"Configured Monitor"
	Device		"Configured Video Device"
EndSection

Section "Device"
	Identifier	"Configured Video Device"
EndSection

[\CODE]

If the external monitor is not plugged in,
the default conf will set the resolution to the native
value "1280x800".

If the external monitor is plugged in, it
will set the resolution to "1023x768" for both monitors
and clone the screen.

-----------------------------------------------------------------------

2.) The configuration from the gnome-display-properties tool:

[CODE]

Section "Monitor"
	Identifier	"Configured Monitor"
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Monitor		"Configured Monitor"
	Device		"Configured Video Device"
	SubSection "Display"
		Virtual	2048 768
	EndSubSection
EndSection

Section "Device"
	Identifier	"Configured Video Device"
EndSection

[\CODE]

This works very buggy. The monitors have different resolution, but
its not possible to drag the mouse from one monitor to the other.
Also, the second monitor never gets a refresh, so all output
stays forever on the screen.

-----------------------------------------------------------------------

3.) I tried to write my own configuration:

[\CODE]

Section "Device"
	Identifier	"Configured Video Device1"
        Screen 0
EndSection

Section "Monitor"
	Identifier	"Configured Monitor1"
EndSection

Section "Screen"
	Identifier	"Default Screen1"
	Monitor		"Configured Monitor1"
	Device		"Configured Video Device1"
EndSection

Section "Device"
	Identifier	"Configured Video Device2"
        Screen 1
EndSection

Section "Monitor"
	Identifier	"Configured Monitor2"
EndSection

Section "Screen"
	Identifier	"Default Screen2"
	Monitor		"Configured Monitor2"
	Device		"Configured Video Device2"
EndSection

Section "ServerLayout"
	Identifier	"Default Layout"
        # singlehead
        #screen "Default Screen1"
        # dualhead
        screen 0 "Default Screen1" 0 0
        screen 1 "Default Screen2" rightof "Default Screen1"
	#Option   "Xinerama" "On"
        Option "Clone" "Off"
EndSection

[\CODE]

It didn't work with "screen 0" and "screen 1". It could only clone
the displays.

Regards,
beauman