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Some Lenovo ThinkPads owners report unusable devices after being given the option "Thunderbolt Bios Assist" put in bios. As a result, the devices no longer boot into the OS and do not display any images. Even POST information is not displayed. This is the third generation Thinkpad X1 Yoga and the Thinkpad P52. The installed operating systems include, for example, the Linux Arch and Ubuntu 18.04 distributions.
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The user ernstm1 had his Thinkpad P52 repaired after the incident and then individually activated the bios settings. Only option "Bios support for Thunderbolt" I made the laptop unusable again, he reports in a thread of Lenovo's support forum. Some other users have been able to reproduce the behavior. Another user writes that Lenovo does not know this behavior.
In addition, Windows 10 is not protected
In a second thread, the user gwilson19 writes about a similar problem with the Thinkpad X1 Yoga. He installed the Fedora 28 Linux distribution. Again, he was looking for a fix, but with a version of Windows 10 installed by Lenovo. The problem could be replicated. Windows users are also concerned. Both discussions already have several pages.
The only solution up until now by Lenovo is to send a damaged laptop. Technicians must replace the entire motherboard, which evokes an error directly in the bios or the firmware. As long as Lenovo ThinkPads owners should avoid the function.
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