[Bug 1875892] [NEW] Display Interfaces Not Detected

2020-04-29 Thread Bill Zhong
Public bug reported: My laptop (Lenovo ThinkPad P51) has 2 display interfaces. One mini-dp and one HDMI. But none of them is shown in xrandr, and my external display connected through mini-dp is not detected also. When I used LiveCD, the external monitor works normally. The above situation

[Bug 1875892] Re: [nvidia][Lenovo P51] Mini-DP and HDMI ports are missing

2020-04-30 Thread Bill Zhong
I solved this problem by re-install the OS. When I install the OS, I did not check the checkboxes to install updates and third-party software (I checked to install third-party software last time). Therefore the nouveau driver instead of the NVIDIA one will be installed. Then I changed the apt

[Bug 1875892] Re: [nvidia][Lenovo P51] Mini-DP and HDMI ports are missing

2020-04-29 Thread Bill Zhong
I tried to use Ubuntu Drivers to switch my GPU driver from NVIDIA to nouveau driver. But nothing happens and the ports are still missing. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875892 Title: