Can't enter coherence after updating to parallels 18.

R

rennyo

Bit poster
After updating to parallels 18, my windows 11 host failed to switch to coherence mode.

"An error occurred while switching to Coherence. Please try again"

Not sure if this is related to my prior error(also after updating to parallels 18), i added video.metal=0 in the boot order to fix this error.
 
Hello @rennyo, We are glad that you have resolved the issue. Thank you for sharing your experience in order to resolve the issue. Please reach us back for further assistance. Have a nice day!
 
I am having the same issue and have tried re-installing Parallels Toolbox with no change. Still unable to enter Coherence mode since updating.
 
AndrewD21 said:
I am having the same issue and have tried re-installing Parallels Toolbox with no change. Still unable to enter Coherence mode since updating.
Click to expand...
Hello!
Kindly collect a fresh technical report at the moment of reproduction (click Parallels icon (||) > Help > Send technical data > check "Attach screenshots..." > press Send Report) and send the report's 9-digit ID in your reply. Please note that the virtual machine must be running when you collect a report.
 
AndrewD21 said:
405024288

Thank You
Click to expand...
Thank you for the reply. Kindly perform the steps below:
  1. Right-click Windows menu > select Device Manager
  2. Expand the 'Display Adapters' section, right-click Parallels Display Adapter (WDDM) > press Uninstall device
  3. After uninstalling the Parallels WDDM adapter install Parallels Tools again, and they should complete.
 
Issue Persists.

When Parallels tools is re-installed. the "Parallels Display Adapter (WDDM)" is reinstalled within the Windows environment.

I uploaded extra screenshots for steps taken.

I created another Technical Data Export: 405317417
 
Screenshots
 

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I had the same problem--if I suspended and resumed it would work. But I just reinstalled Parallels Desktop and both problems went away.
 
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