thinkpad - Monitor detected in Windows 10 but not Lubuntu - Ask Ubuntu


i'm running lubuntu 16.10 on lenovo thinkpad t450s laptop. have connected vga cable acer v173 monitor. machine dual-boots lubuntu windows 10, , can use monitor fine in windows, lubuntu doesn't seem detect it—it doesn't show in xrandr. same situation obtained when tried old dell monitor. but, had different monitor working fine yesterday, before flew california new jersey (i unfortunately don't remember brand or model). how can debug this?

the problem has disappeared mysteriously appeared. so, @ least time being, it's solved.


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