"bad xrle data"

[Spongman]

if i connect to dispmanx_vnc with realvnc viewer 6.17.1113 using 8-bit mode, then the client repeatedly complains with an error message "bad xrle data" and disconnects/reconnects.

this doesn't happen with any other vnc server i have tried.

[hanzelpeter]

Hello. I have been able to reproduce issue with realvnc viewer. But it is strange as it happens only when I am connected through wifi to raspberry pi. Once I connected via LAN cable the issue has gone.

Can you write me if you are connected through wifi to raspberry pi. I suspect this has something todo with net speed. But when I am on wifi I can normally operate through xtightvncviewer. Strange issue, also google on "bad xrle data" doesn't give much help.

[Spongman]

I was seeing it connected via LAN only. I don't have any reason to believe the connection is bad in any way. I use it for media streaming and it works fine for that.

[fernandog]

Also having issues while in wireless connection.

[hanzelpeter]

Happened with realvnc viewer and LAN connection but only for quick picture change (hello_tiger demo)

[n0valis]

I am having the same issue via Wifi only connecting to a Raspi OpenElec.
Any advice how to solve this?

Update: Ok found it: Options -> Quality: change from Automatic to anything else

[domdorn]

thx @n0valis : Indeed, changing the settings in RealVNC Viewer to just "high" worked for me as well!

[joanEstrada]

2023 and still working. That's weird and clearly a VNC bug.

[inspector71]

I have experienced this bug many times with a version of dispmanx_vnc bundled into a Kodi Add-On.

Unsure if this helps but the work around I apply is to drop the colour depth down to "Hundreds of colours".

So, I'm not convinced this has anything to do with network connection type. It might do, but network connection type might also be a red herring.

I too get this error using RealVNC Viewer, albeit a version that nags the least.

In case this helps debug the issue, though perhaps more likely for RealVNC than the server, whilst already connected, in Hundreds of colours mode, if I attempt to change the slider to a higher setting, I get this:

However, Tight VNC ...

... with these settings:

... seems to be fine.