Running X with 2 separate displays on Debian 10 (Buster)
Thomas Fazekas
thomas.fazekas at gmail.com
Tue Jan 14 08:19:37 UTC 2020
Many thanks for the feedback, unfortunately so far no luck.
I've modified the proposed configuration as follows :
Section "Monitor"
Identifier "Monitor-Laptop"
Option "AutoServerLayout" "on"
Option "Rotate" "normal"
EndSection
Section "Monitor"
Identifier "Monitor-HP2311x"
Option "AutoServerLayout" "on"
Option "Rotate" "normal"
EndSection
Section "Device"
Identifier "Intel0"
Driver "intel"
BusID "PCI:0:2:0"
Screen 0
Option "AccelMethod" "sna"
Option "Monitor-Laptop" "eDP-1"
Option "ZaphodHeads" "0:eDP-1"
Option "TearFree" "on"
EndSection
Section "Device"
Identifier "Intel1"
Driver "intel"
BusID "PCI:0:2:0"
Screen 1
Option "AccelMethod" "sna"
Option "Monitor-HP2311x" "DP-2-3"
Option "ZaphodHeads" "1:DP-2-3"
Option "TearFree" "on"
EndSection
Section "Screen"
Identifier "SCREEN0"
Option "AutoServerLayout" "on"
Device "Intel0"
Monitor "Monitor-Laptop"
SubSection "Display"
Modes "1920x1080"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "SCREEN1"
Option "AutoServerLayout" "on"
Device "Intel1"
Monitor "Monitor-HP2311x"
SubSection "Display"
Modes "1920x1080"
Depth 24
EndSubSection
EndSection
Section "ServerLayout"
Identifier "LAYOUT"
Option "AutoServerLayout" "on"
Screen 0 "SCREEN0"
Screen 1 "SCREEN1" RightOf "SCREEN0"
EndSection
When I start X, it seems to start (it throws no error) but both my screens
stay in "text" mode.
The PCI setting at least is good, the setting in the ZaphodHeads option I'm
not certain of.
In case it might offer additional clues I've attached the xorg logs from a
successful start (where all the settings are detected
but I get a large uninterrupted display) "auto.Xorg.0.log", and the logs of
my failed start "manual.Xorg.0.log" (with the above
listed settings).
I'm not sure whether it makes any difference but my hardware setup is as
follows : I have a Thinkpad T580 connected through
a USB-C connector to a lenovo docking station to which an external screen
is attached (HP) via VGA cable.
Is is possible that my failure of getting this config off the ground is due
to my windows manager ? (cinnamon).
Ultimately what I want to achieve is to have to separate displays each with
its own (but the same type) of windows manager and
more importantly with it's own workspace switcher (so I can switch
workspaces independently)
Any support is welcome.
On Fri, Jan 10, 2020 at 6:42 PM Böszörményi Zoltán <zboszor at pr.hu> wrote:
> 2020. 01. 08. 11:30 keltezéssel, Thomas Fazekas írta:
> > Dear all,
> >
> > I'm sitting in front of a brand new Debian Buster install with 2 monitor
> setup (the one
> > fro the laptop and a main screen).
> > Both are working well, in (what I believe is called) xinerama mode,
> meaning I have wide
> > desktop of 3840 x 1080 size.
> >
> > Now what I would like to have is (I believe) 2 separate displays. I
> understand that this
> > would come with the limitation that I won't be able to drag
> windows/applications between
> > the screens.
>
>
> Something like this should work for you, too:
>
> Section "Monitor"
> Identifier "Monitor-DP1"
> Option "AutoServerLayout" "on"
> Option "Rotate" "normal"
> EndSection
>
> Section "Monitor"
> Identifier "Monitor-VGA1"
> Option "AutoServerLayout" "on"
> Option "Rotate" "normal"
> EndSection
>
> Section "Device"
> Identifier "Intel0"
> Driver "intel"
> BusID "PCI:0:2:0"
> Screen 0
> Option "AccelMethod" "sna"
> Option "Monitor-DP1" "DP1"
> Option "ZaphodHeads" "1:DP1"
> Option "TearFree" "on"
> EndSection
>
> Section "Device"
> Identifier "Intel1"
> Driver "intel"
> BusID "PCI:0:2:0"
> Screen 1
> Option "AccelMethod" "sna"
> Option "Monitor-VGA1" "VGA1"
> Option "ZaphodHeads" "0:VGA1"
> Option "TearFree" "on"
> EndSection
>
> Section "Screen"
> Identifier "SCREEN"
> Option "AutoServerLayout" "on"
> Device "Intel0"
> Monitor "Monitor-DP1"
> SubSection "Display"
> Modes "1024x768"
> Depth 24
> EndSubSection
> EndSection
>
> Section "Screen"
> Identifier "SCREEN1"
> Option "AutoServerLayout" "on"
> Device "Intel1"
> Monitor "Monitor-VGA1"
> SubSection "Display"
> Modes "1024x768"
> Depth 24
> EndSubSection
> EndSection
>
> Section "ServerLayout"
> Identifier "LAYOUT"
> Option "AutoServerLayout" "on"
> Screen 0 "SCREEN"
> Screen 1 "SCREEN1" RightOf "SCREEN"
> EndSection
>
> Now, the ZaphodHeads setting is something you need to
> set up for your own machine, since vendors can wire
> up video outputs differently. Look for messages like this
> in /var/log/Xorg.0.log:
>
> [ 42699.692] (II) intel(0): switch to mode 1024x768 at 60.0 on DP1 using
> pipe 0, position (0,
> 0), rotation normal, reflection none
>
> There will be one such line for every connected video output
> but autodetected when there's no explicit configuration.
> You need to specify the pipe number along with the output name
> in Option "ZaphodHeads" for every Device section in the config.
>
> Also, BusID should match your machine, not the above quoted example.
>
> Another thing is that with using the Intel driver, the outputs
> are called DPI1, VGA1 and so on, with the output type and number
> written as you see. With the modesetting driver, they become
> DPI-1, VGA-1.
>
> Best regards,
> Zoltán Böszörményi
>
>
> >
> > My hardware (inxi -GxxS) :
> > System: Host: thobian Kernel: 4.19.0-6-amd64 x86_64 bits: 64
> compiler: gcc v: 8.3.0
> > Desktop: Cinnamon 3.8.8 dm: startx
> > Distro: Debian GNU/Linux 10 (buster)
> > Graphics: Device-1: Intel UHD Graphics 620 vendor: Lenovo driver: i915
> v: kernel bus ID:
> > 00:02.0 chip ID: 8086:5917
> > Display: tty server: X.Org 1.20.4 driver: modesetting
> unloaded: fbdev,vesa
> > resolution: 1920x1080~60Hz, 1920x1080~60Hz
> > OpenGL: renderer: Mesa DRI Intel UHD Graphics 620 (Kabylake
> GT2) v: 4.5 Mesa
> > 18.3.6 compat-v: 3.0
> > direct render: Yes
> >
> > As far as I'm concerned there is currently no xorg.conf configuration
> file that would
> > store any X config, everything comes from the "auto config"
> >
> > Thanks in advance
> >
> > _______________________________________________
> > xorg at lists.x.org: X.Org support
> > Archives: http://lists.freedesktop.org/archives/xorg
> > Info: https://lists.x.org/mailman/listinfo/xorg
> > Your subscription address: %(user_address)s
> >
>
>
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