12-01-2018 06:59 PM
This happened to me with my brand new X1 Extreme. Changed the BIOS setting to Discrete graphics and now have the black screen.
Could someone with a working X1 Extreme post the blind instructions to change the BIOS setting back to Hybrid? Such as right, left, enter, down, or whatever like that.
12-01-2018 10:57 PM
I upgraded to the BIOS 1.17 without any problem. Didn't changed the settings for the Thunderbolt or discrete.
The system is stable and pretty powerful with a M.2.
I did a GPU stress test with the Hybrid mode. This is not that bad, when the GPU need more power, the quadro kick in.
I put the power state for the intel to maximum power (balanced by default). It kindly use both of them at the same time.
12-02-2018 01:53 PM
I was one of the ones whose laptop (T580) was bricked after enabling "Thunderbolt BIOS Assist Mode".
My new laptop arrived last week, 1 month after the first laptop.
Given that there's two different ways to brick your laptop ("Thunderbolt BIOS Assist Mode" and "Discrete Graphics") - both of which occur by simplying toggling an option in the BIOS - I'm afraid of changing any settings in the BIOS.
12-02-2018 03:12 PM - edited 12-02-2018 03:14 PM
[edit: On my P52] I've used Discreet Graphics with no problems but I refuse to touch any of the Thunderbolt settings. Now that I have a Dell monitor I can just use the Display connector like a normal PC.
12-03-2018 01:47 AM - edited 12-03-2018 01:47 AM
I always read that it worked to enable discrete graphics before a certain BIOS update. But then Lenovo broke something.
Did anyone try to enable Discrete Graphics on 1.17 for the first time and post his/her experience?
12-05-2018 07:06 AM
Just adding to the stack. I got my P1 (20MD machine type) and went about adjusting everything in BIOS for Linux and bricked the whole thing in less than an hour.
12-05-2018 07:58 AM
I got my P52 back from the repair depot. It came with 1.17 BIOS installed. Changed the grpahics setting to discreet, and was able to install linux ok. Windows won't activate, apparenlty because the laptop has a new screen and mainboard.
I'm not chanigng the thunderbolt settings. There are a number of bios settings I would play around with, but not if there is a chance with bricking it again and another months wait for a repair.
12-06-2018 08:41 AM
Hi bro, can you try the setting switch fn key and ctrl key in bios, also with f1-f12 can directly hit no need to hold fn key(sorry i dont know how to call that bios setting) because it very useful when i can directly hit f5(refresh on the desktop) no need extra hit fn.
Please help me out these setting safe to edit. I very afraid of black screen issue. Due to my laptop ship from usa to my country. So i can't send to warranty if something went wrong.
12-06-2018 10:01 PM
At that point, can we get a statement by Lenovo? I mean, BIOS 1.17 is supposedly including fixes for Thunderbolt assist mode AND discrete graphics. Does it work now, with certitude? Because it is evident that no one in his own mind is going to try this to end up with P52 bricked again.... and probably months to wait for a repair.
12-07-2018 02:52 AM
I got the motherboard replaced (I think). The BIOS version was back at 1.03 (or something similar), so I installed the latest (1.17), and then tried to change to discrete graphics again. No issues so far. Have not tried thunderbolt.