xcb_connection_has_error() returned true

[Augusto Baffa]

Hi, 

 I've installed the pidp-11 on my rpi3 but when I use the RT11 system via ssh I'm receiving many annoying messages "xcb_connection_has_error() returned true". Does anyone can help me with this? what am I doing wrong?

ps: I have only the rpi3. My pdp-11 painel kit will be shipped soon :)

Best,

Augusto Baffa

[Augusto Baffa]

It seems to be related to the vt parameter... I've ignored the following lines and it's not showing that message anymore:
;set vt crt=vr14
;set vt scale=2
;set vt enable

I'm using the last version of Raspberry Pi OS (and updated)

[isy...@gmail.com]

Dear Augusto,

 This is a problem with the X-window system on the Pi. Do you have a display attached to it and if so, what is the resolution.

 I suspect that the VT11 system is unable to open a window because of the X11 configuration.

Regards, Ian.

[isy...@gmail.com]

Dear Augusto,

 Ooops, I had not seen your PS. If you don't have a panel, the function of the PiDP11 app is undefined.

 However, the above point is relevant as well. I would also note that this error can occur if the

 sound system is not setup correctly (unlikely if you have a recent raspbian image).

Regards, Ian.

[Augusto Baffa]

Dear Ian, 

 I had a monitor attached when I've tried from ssh and locally.  Do u have any suggestions to fix X11.. its working properly on desktop.

 

 I'll check my sound configuration also.. thx

best,

Augusto Baffa

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[david_...@brown.edu]

I could not find the original message on this mailing list, but maybe on the website — I remember needing to change the size of the RPi screen background to something larger than the default that I got when I started using VNC. I was using vnc viewer on my phone and ended up somewhere smaller than 800x600, which was not enough to allocate a buffer for the vr14 device. 
Try running xdpyinfo and see what it says about screen #0

  -- ddj

Dave Johnson

On Mar 20, 2021, at 9:27 AM, Augusto Baffa <augb...@gmail.com> wrote:



To view this discussion on the web visit https://groups.google.com/d/msgid/pidp-11/CAFxfXNNO16U_jExeD4ReLBk4JYCsU9%3DJFQkZP6KSQY-SOxSjOg%40mail.gmail.com.

[david_...@brown.edu]

The email was 5/20/2020 suggesting use sudo raspi-config to set a proper screen resolution. Default is 720x480. I chose 800x600. Go 7 Advanced Options then A5 Resolution. 

  -- ddj

Dave Johnson

On Mar 20, 2021, at 9:57 AM, david_...@brown.edu wrote:

I could not find the original message on this mailing list, but maybe on the website — I remember needing to change the size of the RPi screen background to something larger than the default that I got when I started using VNC. I was using vnc viewer on my phone and ended up somewhere smaller than 800x600, which was not enough to allocate a buffer for the vr14 device. 

[david_...@brown.edu]

Of course this didn’t help, I tried somewhat larger resolution and still no joy. Set vt to disabled and rt11 does not complain any more.  Set it higher and now I can’t get back into the Pi using VNC

  -- ddj

Dave Johnson

On Mar 20, 2021, at 11:33 AM, david_...@brown.edu wrote:

The email was 5/20/2020 suggesting use sudo raspi-config to set a proper screen resolution. Default is 720x480. I chose 800x600. Go 7 Advanced Options then A5 Resolution. 

[Augusto Baffa]

I changed the audio to headphope but  still getting the same error. 

It appears a cross on screen and this on terminal. Resolution is ok 1280:1200

[Johnson, David]

It seems to come up now, two things that I did after cranking up the resolution and rebooting:

1) add these two lines near the front of /etc/init.d/rc.pidp11 

export XDG_RUNTIME_DIR=/run/user/1000
mkdir -p $XDG_RUNTIME_DIR

where 1000 is the userid for the "pi" user

2) after rebooting, login as pi, sudo /etc/init.d/pidp11 restart, then run ./pdp.sh from ~pi/.

Something to do with where a user's temp files are stored, the directory doesn't exist until the user is logged in,

I have yet to try to run anything that accesses the blank screen that pops up.

[Augusto Baffa]

Thank you for all ur help. I find out that I had to configure the autologin to X11 on raspi-config 

:D