Thunderbolt 3 - NVM 23

[pierpaolodimarzo]

1. BIOS assist mode was disabled (original default setting)

2. Go to Lenovo and download:
   Intel Thunderbolt Software (Version 17.x = n22ta14w.exe = latest)
   Thunderbolt Firmware Update Utility (n24th13w.exe = latest)
   Lenovo Power Management Driver (n3aku12w.exe = 1.68.30.0 i.e. an older version)

3. Turn on Flight mode to prevent Windows updating drivers

4. Uninstall Thunderbolt Software or Control Centre and go to Device Manager and uninstall Thunderbolt(TM) Controller

5. Whilst in Device Manager uninstall Lenovo PM Device

6. Restart

7. Install n22ta14w.exe and n3aku12w.exe

8. Restart

9. Go into Device Manager and check that Thunderbolt(TM) 17.4.80.94 and Lenovo PM Device 1.68.30.0.
   You can also check Thunderbolt version in the Sys Tray Thunderbolt Software (Right click) -> about

10. Plug in charger to laptop, I used the non-Thunderbolt USB-C port due to the installation instructions on the next step

11. Install n24th13w.exe which will take you through an installer (which I hadn't seen until using the older Lenovo PM Device driver). It will say something along the lines of not plugging anything into Thunderbolt

12. Finish the installer and restart

13. Check Lenovo Software in Sys Tray; NVM version 23.0

14. Now turn on Wi-Fi

Thunderbolt_Update.zip

[dinels12]

Can you please leave a tutorial of dual boot win11/Ventura? please

[vigilancer]

Your instructions did't work for me (couldn't update NVMe firmware 20 -> 23).
Instructions from this reddit post helped: https://www.reddit.com/r/thinkpad/comments/ew400w/t480_thunderbolt_issue_solved/

[widiu7omo]

It's working if you follow the instruction carefully. Mine T480 i5-8350U

[misha1350]

I managed to install it properly on the second try, as the PM Device apparently refused to be uninstalled+removed. It showed ver. 1.68.37.0, which is the newest version and not the one that works. After trying it again on the second try, I noticed that the PM Device driver had become 1.68.30.0, and that was before I was going to install the PM Device driver, so I moved on to other steps because the requirement has already been met.

I dodged the bullet somehow because to this day the Thunderbolt version was 14.0 on my T480 that I got last week. It worked well, but I had problems with connecting my second external monitor, whether I connected the first or the second one via HDMI or USB-C. Somehow it all started working fine after trying the Thunderbolt port yet again.

[fpolguti]

Sorry for opening this again, I'm doing all those steps on a T490.
I'm stuck here
Go into Device Manager and check that Thunderbolt(TM) 17.4.80.94 and Lenovo PM Device 1.68.30.0.
You can also check Thunderbolt version in the Sys Tray Thunderbolt Software (Right click) -> about

I can see Lenovo PM Device but I can't see the driver Thunderbolt(TM) so when I try to install the firmware later I'm getting this error: 0x227 SDK_NO_DRIVER Thunderbolt DCH software is not installed

Thanks for any suggestion.

[okbrown]

So there is no process one can follow, if you already have macOS installed?