So I bought two 1440p monitors for my thinkpad L15 Gen 1 (i5-10210u) and thinpad 40AS dock.
As it turns out intel version of this laptop only support 1.2 display port which isn't enough to run both of them at 1440p. I tried connecting one monitor to laptops hdmi and another one via docks displayport, but it turns out that hdmi and type c port is using same video out so it doesn't work.
Then I found out that it should work if I connect one monitor through another type c port. So I bought usb-c to displayport cable which supports 4k but it still doesn't work. It does show up in windows display settings and it detects correct model but I can't enable it. If I select "extend this monitor" all screens blinks for a second and reverts to "disable this monitor". Also if I keep it connected all monitors blinks from time to time as if it's connecting/disconnecting.
I even tried to unplug dock and connect usb-c to displayport alone but it still doesn't display.
usb-c to dp cable could be broken but since they aren't cheap I would like to know for sure if my laptop supports setup like this (one monitor from dock and another from second usb-c port both at 1440p). Or maybe there's some other setups that could work? Apart from buying 40AN dock which costs almost as much as my two 27" monitors..
As it turns out intel version of this laptop only support 1.2 display port which isn't enough to run both of them at 1440p. I tried connecting one monitor to laptops hdmi and another one via docks displayport, but it turns out that hdmi and type c port is using same video out so it doesn't work.
Then I found out that it should work if I connect one monitor through another type c port. So I bought usb-c to displayport cable which supports 4k but it still doesn't work. It does show up in windows display settings and it detects correct model but I can't enable it. If I select "extend this monitor" all screens blinks for a second and reverts to "disable this monitor". Also if I keep it connected all monitors blinks from time to time as if it's connecting/disconnecting.
I even tried to unplug dock and connect usb-c to displayport alone but it still doesn't display.
usb-c to dp cable could be broken but since they aren't cheap I would like to know for sure if my laptop supports setup like this (one monitor from dock and another from second usb-c port both at 1440p). Or maybe there's some other setups that could work? Apart from buying 40AN dock which costs almost as much as my two 27" monitors..