I am using the yocto Morty release and Linux 4.9 kernel.
I am booting the device without connecting HDMI. When I connect the HDMI display to the device after device is booted, the HDMI display screen is streached or corrupted.
* In u-boot, display boot args is set for HDMI display
To debug this issue I'm checking the HDMI supported video modes from xrandr and sys.
Video modes before HDMI connected:
|$ cat /sys/class/graphics/fb0/modes||$ xrandr|
|Screen 0: minimum 240 x 240, current 1920 x 1080, maximum 8192 x 8192|
DISP3 BG connected 1920x1080+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
Video modes after HDMI connected:
Video modes in sys entry updated after HDMI connected, but Xrandr is not updating. Is that make any HDMI display screen streched issue.
$ cat /sys/class/graphics/fb0/modes
After I restarted the Xserver, both xrandr & sys entry video modes are common and now the hotplug issue is not recreating untill reboot the device.
Is it a know issue or is there any patch is available to solve this issue.