Ubuntu 20.04 host hangs if I copy/paste clipboard to Win10 guest

[Ihor_Bobak]

I have a host with Ubuntu 20.04 and standard Gnome (I did not change anything as to the UI) and Windows 10 as guest.

Shared clipboard is set to "bidirectional".

At the beginning everything work fine, but after 10-20 clipboard copy/paste operations, everything starts to hang: I can't click anywhere, first guest OS freezes (so that I can't even restart it), then in a minute or two host OS freezes and becomes non-responsive. This reproduces many times.

If I switch off the clipboard exchange - everything will be OK for many days long, but as soon as I switch it on - I get that problems.

Guest additions in the guest VM are aligned with the host - the same version.

At the end of the log I have this - maybe it will help. Also I am ready to provide any help for VirtualBox engineers - feel free to contact me to ibobak at gmail dot com and send any custom VirtualBox binaries with additional logging, whatever.

19:13:53.112366 End of Guest state at power off * 19:13:53.204746 PDMR3PowerOff: 92 351 469 ns run time 19:13:53.204759 Changing the VM state from 'POWERING_OFF' to 'OFF' 19:13:53.205148 Console: Machine state changed to 'Stopping' 19:13:53.205558 Console::powerDown(): A request to power off the VM has been issued (mMachineState=Stopping, InUninit=0) 19:14:08.186578 Shared Clipboard: Converting VBox formats 0x1 to 'STRING' for X11 (idxFmtX11=4, fmtX11=2) failed, rc=VERR_TIMEOUT 19:14:38.186794 Shared Clipboard: Converting VBox formats 0x1 to 'STRING' for X11 (idxFmtX11=4, fmtX11=2) failed, rc=VERR_TIMEOUT 19:15:08.187232 Shared Clipboard: Converting VBox formats 0x1 to 'UTF8_STRING' for X11 (idxFmtX11=1, fmtX11=3) failed, rc=VERR_TIMEOUT 19:15:38.187862 Shared Clipboard: Converting VBox formats 0x1 to 'text/plain;charset=utf-8' for X11 (idxFmtX11=3, fmtX11=3) failed, rc=VERR_TIMEOUT 19:16:08.188045 Shared Clipboard: Converting VBox formats 0x1 to 'text/plain;charset=utf-8' for X11 (idxFmtX11=3, fmtX11=3) failed, rc=VERR_TIMEOUT 19:16:38.188318 Shared Clipboard: Converting VBox formats 0x1 to 'STRING' for X11 (idxFmtX11=4, fmtX11=2) failed, rc=VERR_TIMEOUT 19:17:08.188778 Shared Clipboard: Converting VBox formats 0x1 to 'UTF8_STRING' for X11 (idxFmtX11=1, fmtX11=3) failed, rc=VERR_TIMEOUT 19:17:38.189030 Shared Clipboard: Converting VBox formats 0x1 to 'UTF8_STRING' for X11 (idxFmtX11=1, fmtX11=3) failed, rc=VERR_TIMEOUT 19:17:38.189275 Shared Clipboard: Converting VBox formats 0x1 to 'INVALID' for X11 (idxFmtX11=0, fmtX11=0) failed, rc=VERR_NOT_SUPPORTED 19:17:38.189315 Shared Clipboard: Converting VBox formats 0x1 to 'INVALID' for X11 (idxFmtX11=0, fmtX11=0) failed, rc=VERR_NOT_SUPPORTED

[Henning724]

I have almost the same problem and system setup. All the other descriptions align with mine.

Except:

I'm using ubuntu 18.04 as host.

The error in the log is 20 or more lines of:

Shared Clipboard: Converting VBox formats 0x7 to 'INVALID' for X11 (idxFmtX11=0, fmtX11=0) failed, rc=VERR_NOT_SUPPORTED

[galitsyn]

Hi guys,

Could you please try VirtualBox 6.1.28? We have improvements in shared clipboard area there. Both VBox and Additions update is necessary.