02-16-2017 02:14 AM
I have an older external monitor with touch screen functionality that works over USB. Whenever the USB is connected to the OneLink+ dock, my X1 Yoga gets stuck at the "Lenovo" splash screen on red background and doesn't proceed to boot. Booting and the touch screen both work fine when I plug in either the USB or the whole dock after boot.
I know other users have had this issue, but it seems upgrading the firmware fixed it for them, which didn't work for me (firmware V2.33.000). Anything else I could try?
03-10-2017 03:42 PM
What BIOS version are you running? There was a fix included in v.21 which resolved the issue you describe:
UEFI: 1.21 / ECP: 1.14
- (Fix) Fixed an issue where the computer might not boot when keyboard with USB
hub is attached to USB2.0 port of ThinkPad USB 3.0 Dock.
- (Fix) Fixed an issue where the boot is paused for more than seconds when
specific USB device is attached to the computer.
- (Fix) Fixed an issue where the computer might not boot when attaching to USB3.0 Hub
on ThinkVision T2224z Monitor.
08-12-2017 06:43 AM
Hi, I'm having the same problem, but only if the USB cable is attached. I've connected a Thinkvision X1 Screen via USB C to USB A cable to use the built-in webcam. Video is connected via DP. All Lenovo Driver and Bios updates are installed.
11-02-2017 12:40 AM
Did you ever find a solution to this? We have over 500 of these X1 Yoga 1st Gen laptops and if connected to the OneLink+ Dock with any USB device (monitor, bluetooth dongle, keyboard etc) it will fail to pass the Lenovo splash screen at boot. Only way to progress is to undock and reboot. We have tested with the latest bios 1.31 and still it will not work.
11-02-2017 03:35 AM
I'm sure I've found a solution. In the bios go to Configure, then USB, then Disable USB UEFI...
This seems to resolve the issue for the machines we have tested with.
11-04-2017 01:24 AM
Thanks, this actually does the trick. However, if you're booting from flash drives a lot it will be annoying to always change this setting. I'm still hoping for a permanent fix by Lenovo.
For quite a while, my machine has actually begun to pass the Lenovo splash screen, only to get stuck with a black screen afterwards with a flashing white cursor in the top left. This not only happened with the touch screen monitor USB cable attached to the Dock, but also with the receiver of a new wireless mouse that I always kept plugged in the laptop, not the Dock (but only when the Dock was attached at the same time). So the Dock seems to change the behaviour of all USB ports, even the ones on the laptop.