[mythtv-users] Change on Raspberry PI OS to kernel 5.4.51 causing issues with Mythtv??
mike.bibbings at gmail.com
Fri Jul 24 14:41:36 UTC 2020
On 22/07/2020 23:48, James Abernathy wrote:
> On Wed, Jul 22, 2020 at 6:33 PM James Abernathy <jfabernathy at gmail.com
> <mailto:jfabernathy at gmail.com>> wrote:
> I was helping someone on the forum with a mythtv light problem and
> discovered I now had it also.
> I just installed a fresh Raspberry Pi OS with Desktop and did a
> full update and discovered that the kernel is now 5.4.51.
> I use MikeB's pi-utils that install v31 mythtv-light and setup the
> raspberry Pi for mythfrontend. Always works until today.
> I've attached the console output, but the key difference now is
> that mythfrontend never starts and it seems to loop with the error
> message below until you kill it from ssh.
> Could not queue DRM page flip on screen HDMI1 (Invalid argument)
> Jim A
> What seems to get around it is this:
> Get rid of the part referencing the json file:
> and added the export:
> export QT_QPA_EGLFS_ALWAYS_SET_MODE="1"
> Jim A
Thanks for the information about QT_QPA_EGLFS_ALWAYS_SET_MODE="1".
Whilst your change will work for some configurations, the removal of
QT_QPA_EGLFS_KMS_CONFIG=/home/pi/pi_mythfrontend.json causes other
problems namely wrong screen configuration being used depending on
capability of connected monitor/TV.
I have updated both run_mythfrontend.sh and run_mythsetup.sh at
The change is to add QT_QPA_EGLFS_ALWAYS_SET_MODE="1". to the existing
command line as appropriate.
Tested on Pi4 and Pi3
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