I've an old slap-top that I stream to my flat screen tv. I used to leave the HDMI cable attached and boot with no problem. Now the slaptop boots trying to out put to the tv (even when tv is off) and the monitor on the slaptop is scrambled. Thus I can not read the grub menu! I also lost my panel, which freaked me...
After walking the dog........
I unplugged the HDMI and my panel returned, poof! All is well except I must boot with the HDMI cable unplugged.
OS: Manjaro Current.
Kernel: x86_64 Linux Current.LTS-MANJARO
Shell: bash Current
CPU: Intel Core i5-4440 @ 4x 3.3GHz [27.8°C]
GPU: Mesa DRI Intel(R) Haswell Desktop
RAM: 874MiB / 7905MiB