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Doc_blue_sky
What's DOS?
Posts: 1
Registered: ‎09-17-2018
Location: FR
Views: 359
Message 1 of 1

X270 Hdmi 4K output not working (sometimes yes, sometimes not)

Hi everybody,

I have an incomprensible problem with my X270. I use an external monitor in 4K with an HDMI cable (my dock don't have displayport). But the 4K output isn't working all the time. 

When I turn on the computer sometimes I only have 1080p resolution and I can't change it (for 4K, I can for less like 720p). But sometimes, it is working fine. Even if I don't change anything. For exemple, I do an update, restart my computer and after it, without changing anything, I only obtain 1080p. If I restart 3 hours later, I can have 4K. (I am on Windows 10)

But, I also have Debian on my computer but I prefer W10 when I use my 4K monitor because Debian isn't perfect with 4K. But on Debian, the computer can offer 4K on the monitor everytimes. There is no problem to detect 4K on Debian. So I don't understand why it is not working with W10.

Any of you have the same problem or a solution?

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