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bjoernt
Paper Tape
Posts: 2
Registered: ‎11-07-2019
Location: US
Views: 367
Message 1 of 4

Thinkpad X1 Extreme Gen 2 Thunderbolt egpu freeze before BIOS post

 
Reposting in correct sub forum:

 

Hello,

 

who is using the Thinkpad X1 Extreme Gen2 with an eGPU ?

I have it perfectly working fine with my Razor Core X but once I reboot the laptop or cold boot into the OS, it just hangs before BIOS POST (black screen, no beep). I tired

 

Disabled Kernel DMA protection
Disabled Thunderbolt security
Changed to Legacy boot mode
Update firmware of the X1 to 1.27
Using Nvidia 2080S or AMD Vega 64 Cards
Testing both TB3 ports
 

Does have someone similar experience ?

I can only POST with egpu unattached and then connect it during OS boot which is quite annoying.

 

Thanks

Bjoern

 

cgli
Fanfold Paper
Posts: 10
Registered: ‎09-18-2019
Location: US
Views: 321
Message 2 of 4

Re: Thinkpad X1 Extreme Gen 2 Thunderbolt egpu freeze before BIOS post

Same Problem here. Looks like it is a whitelist in bios that prevent egpu from booting with POST... I hope lenovo could solve this problem. Sarcasticly, my old xps works fine with egpu. That's really not what I expect from a 2019 $2500+ laptop

AlvinZhu
Blue Screen Again
Posts: 5
Registered: ‎11-20-2019
Location: CN
Views: 180
Message 3 of 4

Re: Thinkpad X1 Extreme Gen 2 Thunderbolt egpu freeze before BIOS post

I have the similar problem.
I am using Think Pad P1 Gen2 and Mantiz Venus eGPU with a MSI GeForce GTX 1070Ti.

I can reboot or cold boot the laptop with egpu attached.
But sometimes it hangs (no beep, the BIOS Logo shows).

I can reproduce the problem with the following steps:
1. unattach power adapter, egpu or anything else.
2. power on the laptop (battery only) .My operating system is Windows 10 pro ( Lenovo Pre-installed).
3. put the laptop to sleep by close the lid. after 3 hours, It will switch to hibernate Automatically(Maybe I can put it to hibernate directly, haven't try yet.)
4. attach the egpu. The laptop will still be in hibernate mode. and It will start charging via Thunderbolt.
5. open the lid. the laptop is woken up. but the egpu not working.
6. reboot. the laptop will hang (no beep, the BIOS Logo shows).

My BIOS version is 1.27.

Dave2020
Blue Screen Again
Posts: 6
Registered: ‎12-12-2018
Location: DE
Views: 160
Message 4 of 4

Re: Thinkpad X1 Extreme Gen 2 Thunderbolt egpu freeze before BIOS post

eGPU is really a big topic. 

I now always boot without having the eGPU plug in. After the thunderbolt software started running, perhaps 5 to 10 seconds after the logging in, then only I plugin. 

And we're back...

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