Hi,
I couldn't believe it, but the problem seems to be the cable.... I feel like a bloody newbie not checking this first
But you gave to solution: the xrandr brought me first this line:
(old cable)
QuoteDisplay More
LibreELEC:~ # xrandr
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192
HDMI-0 connected primary (normal left inverted right x axis y axis)
1024x768 60.00
800x600 60.32 56.25
848x480 60.00
640x480 59.94
HDMI-1 disconnected (normal left inverted right x axis y axis)
VGA-0 disconnected 1280x1024+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1280x1024 (0x55) 108.000MHz +HSync +VSync
h: width 1280 start 1328 end 1440 total 1688 skew 0 clock 63.98KHz
v: height 1024 start 1025 end 1028 total 1066 clock 60.02Hz
The new cable gave me:
QuoteDisplay More
LibreELEC:~ # xrandr
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192
HDMI-0 connected primary (normal left inverted right x axis y axis)
1920x1080 50.00 + 60.00 59.94 24.00 23.98
1920x1080i 60.00 50.00 59.94
1280x720 60.00 50.00 59.94
720x576 50.00
720x576i 50.00
720x480 60.00 59.94
720x480i 60.00 59.94
640x480 60.00 59.94
HDMI-1 disconnected (normal left inverted right x axis y axis)
VGA-0 disconnected 1280x1024+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
1280x1024 (0x55) 108.000MHz +HSync +VSync
h: width 1280 start 1328 end 1440 total 1688 skew 0 clock 63.98KHz
v: height 1024 start 1025 end 1028 total 1066 clock 60.02Hz
First I thought it was just a mistake, but I can reproduce it again and again... Stupid faulty cable
Thank you very much for your help.
Greetings