There have been a few fixes for resolution in the latest ViX changelog.
ATV usually has the same bugs so maybe a software update is needed?
ViX 5.1.025 changelog:
openvix: release 5.1.025
Merge branch 'Dev'
Revert "AR for 2160 now also works in 1080 is default resolution"
openvix: developer 5.1.025.011
[ConfigList] Revert to last working version.
partly reverted 6dfe23c0b29b4e5fe4be63065322caf92b3d6561 due to a merge mistake
ConfigList: small code optimization for onDeselect
openvix: developer 5.1.025.010
Test Alphablending fix. Info here:
https://forums.openpli.org/topic/59164-gpixmapcpp-horrible-bug/
[configure] remove c++11 flags from CFLAGS. It doesn't belong there, it's a C++ feature.
[accel] remove newline from debug (#1454)
init: use nullptr for NULL-checking and assignment
pause init while loading plugins this ensures that autoinit objects contained in external libraries are initialised in the correct order
init: add support to pause init
[configure.ac] add glib-2.0 into BASE PKG_CHECK_MODULES This should problably fix the following error on Travis CI: base/wrappers.cpp:7:18: fatal error: glib.h: No such file or directory #include <glib.h>
[ConfigList] try fix GSOD on ShowHelp and HideHelp (#1437)
[servicedvb] setSyncPCR also when there is no audio It seems that since commit 0d3d4b9 we are setting PCR PID only when there is an audio.
picload: fix 8-bit background filling
[SystemInfo] detect if rootfs is boot from mmc
[SystemInfo] add systeminfo 24hz videomode
Revert "Test possible GUI fix."
openvix: developer 5.1.025.009
Test possible GUI fix.
openvix: developer 5.1.025.008
openvix: developer 5.1.025.007
[gpixmap/accel] add some missing code from previous picks.
[configure] remove rogue amlogic code
openvix: developer 5.1.025.006
Revert "[Configure.ac] Test a GUI fix for ET-8500."
openvix: developer 5.1.025.005
[Configure.ac] Test a GUI fix for ET-8500.
openvix: developer 5.1.025.004
[HardwareInfo] add to "is_nextgen"
Revert "[HardwareInfo] Add a few boxes to "is_nextgen""
openvix: developer 5.1.025.003
AR now switches also to 2160 if 1080 is set as default
[HardwareInfo] typo
openvix: developer 5.1.025.002
[HardwareInfo] Add a few boxes to "is_nextgen"
[AVSwitch] Add correct video outputs for new Gigablue X3.H.
openvix: developer 5.1.025.001
Revert "[ActionMap] HelpableActionMaps multiple contexts (#253)"
AR for 2160 now also works in 1080 is default resolution
AR added 2160p30 for 2160p24