[mythtv-users] Warning OpenGL not available?

Mike Perkins mikep at randomtraveller.org.uk
Sun Apr 25 11:28:40 UTC 2021

On 25/04/2021 12:21, Paul Harrison wrote:
> On 25/04/2021 12:07, Jim Abernathy wrote:
>> I occasionally watch Mythtv with mythfrontend on my dual monitor PC on one screen while doing 
>> something else.  This morning I tried launching mythfrontend and as it started the upper right had 
>> a temporary message saying: "Warning: OpenGL not available"
>> I basically could not play anything. I have been on the 4/19/2021 version 31 on frontend and 
>> backend for several days with no issues. I could use VLC and copy the ASX link from mythweb for a 
>> recording and it played fine.
>> So I finally rebooted and it fixed itself. Not sure what happened, but watch out.
>> Jim A
> MythTV now effectively requires working OpenGL. It will fall back to the Qt painter if it's not 
> available but as you found that completely disables video playback and you will probably find many 
> rendering problems in the GUI.
> Don't know if it's related but for the first time ever I saw something similar using a QML based 
> program. I rebooted and haven't seen it since though \0/. I wonder if a Qt update or NVidia driver 
> update or something has broken something? Are you using the NVidia propitiatory driver?
> Paul H.
It may not be a mythtv thing. I'm still on v30 (lack of time) and recently had a similar message 
when trying to view something I knew was fine. Sometimes just restarting the front end was enough to 
clear it. It may be a kernel or library thing.


Mike Perkins

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