Long are you using vga, dvi, hdmi? Something else? And what graphics card? It seems strange the colors are off but because you say the screen sometime goes black I wonder if there is a problem within the video driver.
________________________________ From: Long Wind <longwi...@yahoo.com> Sent: Saturday, August 4, 2018 8:12 AM To: Debian-user List Debian Subject: monitor problem with stretch if my monitor isn't properly plugged to back of computer color of screen is slightly different from correct color i can see grub menu and booting stretch but after a while screen become blank i have to press power button to shutdown this is stretch problem, because Windows on the same disk can boot and run even if monitor isn't properly plugged solution is to plug it properly so that screen color is 100% correct i don't think linux is so fragile, or is it?