10-15-2019 06:53 AM
i just want to share this issue i faced with my Lenovo X1 Extreme gen 2. Previously i am running on discrete graphics. All is fine until i was prompt for an Bios Update which i horribly regretted to approve updating my bios.
After updating my bios to 1.26. my brightness function is not working. Broken. Bricked. I do see the bar and slider moving up while pressing Fn+F6 and down using F5 but the screen brightness does not change.
I tried reinstalling the following
1. HotKey drivers
2. Intel Graphic Drivers
3. Nvida Drivers
4. Lenovo Power Managemen
5. Thinkpad Monitor display driver
but none works.
Ultimately, i went to bios to switch from Discrete graphic to Hybrid graphics and it is working.
So whoever out there reading this, please understand the risk and shortcoming of this broken bios update for x1 extreme gen 2.
To Lenovo Support or programmers:
Please identify and fix this bug and release a patch for this issue. thanks
Solved! Go to Solution.
10-21-2019 07:46 AM
Any ETA on the next version?
I heard "end of this month" but it depends on whether any issues are found during test. Sorry I don't have a firmer release date to share with you.
10-22-2019 10:21 AM
Okay, thanks for this.
I know that its not your responaibility but it would be kind of you to let us know here when the new BIOS is generally available
11-04-2019 12:57 PM - edited 11-04-2019 12:58 PM
BIOS update 1.27 is out for the P1, probably is for the X1 as well, brightness control on discrete graphics is working again ! Thanks Lenovo