06-14-2018 04:48 AM
We are using T480s (20L7001VMX), W10 1803 and have a screen problem. The computer is closed but it still detects it as a screen. Every time we restart the computer we get an extra screen. The T480s is in a docking station (40A90090EU), (40A10065EU). The T480s is closed but it still detects it as a screen. We can open the laptop and the close it and the extra screen disappear. We have tried different docking stations, screens, T480s and it’s the same behaviour.
06-14-2018 11:40 PM
Greetings from Lenovo.
Does this issue occurs only when the machine is connected to the docking station? Have you tried updating the drivers? Also, boot the machine into safe mode and check if the issue persists.
07-04-2018 05:33 PM
sorry for late update.
I believe the subject issue was solved by BIOS v1.14 (N22ET37W)
<1.14> UEFI: 1.14 / ECP: 1.08 - [Important] Security fix addresses LEN-22133 Speculative Execution Side Channel Variants 4 and 3a (CVE-2018-3639, CVE-2018-3640). Refer to Lenovo's Security Advisory page for additional information. (https://support.lenovo.com/product_security/home) - (Fix) Fix an issue where Ethernet is unstable when network boot was tried before Windows boot in Legacy boot mode. - (Fix) Fix an issue where the system may hang when entering to BIOS setup menu with USB keyboard at Legacy boot. - (Fix) Fix an issue where the system may not wake by Thunderbolt device after BIOS load default. - (Fix) Fix an issue where Wireless LAN device is disabled at boot when "Disable new DMA devices when this computer is locked" is enabled at Group Policy on Windows 10 Version 1703. - (Fix) Fix an issue where ThinkPad LCD might be detected when LID closed even user set power policy as "Lid Close Do nothing".