Re: [gentoo-user] Xt error: Can't open display: :1

[David Sveningsson]

On 2010-12-06 18:27, David Sveningsson wrote:
> Hi, for years I've been running a multiple monitor setup based on two
> screens, on a few different machines.
>
> Recently, I can not say exactly when but after system upgrades, I am
> unable to open windows on the secondary monitor.
>
> At first I thought this was related to ati-drivers as they cause lots of
> issues anyway but today I got the same problem with another machine
> running nvidia-drivers.
>
> In the console (running X) all I see is:
>
> xterm Xt error: Can't open display: :1
>
> However, by starting a terminal at :0 and address the other monitor as
> :0.1 (which is the correct name) I can start a terminal and from there
> start everything. But that is quite inconvenient.
>
> I don't really know how to debug this as there is so many different
> factors involved, so got any clue on how to solve this? In both cases I
> upgraded the system in one go, so I cant pinpoint a specific version of
> any package without downgrading one at a time.
>
> Xorg is setup as following:
> 2 monitors, 2 cards (multihead), 2 screens and serverlayout setting the
> layout of the monitors.
>
> As window manager I am using fluxbox.
>
> # emerge -pvq fluxbox xorg-x11 xorg-server nvidia-drivers
>
> [ebuild R ] x11-base/xorg-server-1.9.2.901 USE="ipv6 nptl udev xorg -dmx
> -doc -kdrive -minimal -static-libs -tslib"
> [ebuild R ] x11-wm/fluxbox-1.1.1-r2 USE="imlib nls slit toolbar truetype
> -gnome -newmousefocus -vim-syntax -xinerama"
> [ebuild R ] x11-base/xorg-x11-7.4-r1
> [ebuild R ] x11-drivers/nvidia-drivers-260.19.21 USE="(multilib) -acpi
> -custom-cflags -gtk"
>
> So, any ideas?
>

To further investigate the problem I used genlop and a small 
pythonscript to mask all packages recently updated.

I found that downgrading from x11-libs/libX11-1.4.0 to 
x11-libs/libX11-1.3.6 resolves the issue.

Still no idea why it stops working thought.