I have a Dell M3800 and recently purchased a Dell S2715H and connected it to the laptop through the HDMI cable. For whatever reason, the monitor is not detected by ubuntu.
My older dell monitor works with no issue on the same HDMI port (through a DVI to HDMI converter). The new monitor does not have a driver for linux but I assumed a driver is not needed.
Not even sure how to debug this. What could be possibly wrong here?
You need to have the monitor attached PRIOR to booting as Ubuntu does not recognize an HDMI monitor while the system is running. Other monitor types work, but not HDMI. This omission may be resolved in a later kernel.