Endless log spam _CGXGLDisplayContextForDisplayDevice: No matching context for device

[silence]

Originally Posted by Carlo

Can you please copy and paste the log message? It may be a new one.

Kind regards,
Carlo

Can confirm this is an issue on Sierra 12.12.5. My log looks exactly like dude123's, and the existing fix no longer works.

[steve_s]

Originally Posted by dude123

Yes sure!

 No matching context for device (0x7fe957c26f90) - disabling OpenGL

Sender:
/System/Library/PrivateFrameworks/SkyLight.framework/Resources/WindowServer
(/System/Library/PrivateFrameworks/SkyLight.framework/Versions/A/SkyLight)

Subsystem:
com.apple.SkyLight

I am getting the same behavior, running Sierra, with a different 0x... number:

No matching context for device (0x7ff8ca335340) - disabling OpenGL

[wa2flq]

Originally Posted by mcousins

I seem to have stopped the log spam by adding this to my asl.conf in /etc at the top of the file

? [= Sender WindowServer] ignore

And then performing the sudo kill -HUP [PID of process]

I've tired this asl.conf. I can't seem to make it work in Sierra.
I have SIP (temporarily) turned off. Also tried this in /etc/asl/com.apple.windowserver and com.displaylink.windowserver. I can see that aslmanager is restarting after the HUP to syslog.

I still see tons of messages in the Console. Any thoughts as to what I am doing wrong?

[duncanm]

As a temporary fix you can enter the following in your terminal:

sudo log config --process=[PID] --mode "level:off"

where [PID] is the ID of the process you see in the console.

You have to re-do it every time you re-start your mac which is a pain, but at least it saves all those writes to your disk

[wa2flq]

That works, thanks.

[dude123]

Originally Posted by duncanm

As a temporary fix you can enter the following in your terminal:

sudo log config --process=[PID] --mode "level:off"

where [PID] is the ID of the process you see in the console.

You have to re-do it every time you re-start your mac which is a pain, but at least it saves all those writes to your disk

Yes, can confirm, this is the first "solution" that works on Sierra.
MacOS 10.12.6 - DisplayLink 3.1

[benwen]

Originally Posted by duncanm

As a temporary fix you can enter the following in your terminal:

sudo log config --process=[PID] --mode "level:off"

where [PID] is the ID of the process you see in the console.

You have to re-do it every time you re-start your mac which is a pain, but at least it saves all those writes to your disk

Thank you duncamn!

Here's a quick and dirty shell script to automate the finding of the PID

#!/bin/sh
pid=`ps -ax | awk '/SkyLight.framework/ && !/awk/ {print $1}'`
echo "Skylight.framework with OpenGL logorrhea PID found. Suppressing log for PID $pid"
sudo log config --process=$pid --mode "level:off"

Put that in a file 'quite-dlink' in your $PATH, chmod 0755 it and execute it in Terminal at startup.

[paultzirides]

After installing the 4.0 beta, I'm no longer noticing any log spam. I ran the terminal command anyway, but observed no change in the amount or type of logs being generated by the system. Is anyone else seeing the same?

[dude123]

Problem solved!!!

Update to 4.0 didn't make it better on macOS 10.12 - BUT after the system update to 10.13 combined with 4.0 - now finally the log spam is solved and on top of that also the hardware support for video etc is very much improved.

Well done!! Thank you a lot DisplayLink-Team!!!!

[jormsby]

My new MacBook Pro running 10.12.6 and with DisplayLink 4.0.0 is filling up my Console with this error message.

I see where 10.13 might fix it but that is not an option on this work computer.

Any suggestions on how to get this to stop?