Bug: black screen sometimes

[babaric-dev]

Sometimes when logging in a server, it shows a black screen. It seems to occur randomly.

[gujjwal00]

Yeah, that happened for me too with TigerVNC. Next time it happens, please post the logs from AVNC.

[babaric-dev]

I don't want to post the full logcat but which part of the logcat may log this issue?

[gujjwal00]

I want to know if the receiver thread has crashed. Usually there is a stack trace in the logs.

BTW, AVNC can't access full logcat. It only shows logs created by itself.

[gujjwal00]

After some testing, I am about 80% sure this is a bug in TigerVNC. If you disable clipboard sharing in AVNC Settings, you will be able to trigger it more reliably.

It feels like a race-condition. When extended clipboard is enabled, TigerVNC sometimes drops the initial framebuffer update request. So client ends up waiting for update, while server is waiting for update request.

[gujjwal00]

TigerVNC is working correctly. This bug is causes by buffering in LibVNCClient.
Please try the following APK: app-debug.zip

[yuanjv]

TigerVNC is working correctly. This bug is causes by buffering in LibVNCClient. Please try the following APK: app-debug.zip

yes, this version 100% fixed the random black screen for me.
btw, will you include this fix on the next release?

[gujjwal00]

Thanks for testing @yuanjv . Yes, it will be included in next release.

[yuanjv]

great

[gujjwal00]

v2.2.1 is now available with this fix.