Bug 195975

Summary: Kernels 4.11+ reset BIOS settings on Thinkpad Yoga
Product: ACPI Reporter: Julius Bullinger (julius.bullinger+kernelorg)
Component: BIOSAssignee: acpi_bios
Severity: high    
Priority: P1    
Hardware: x86-64   
OS: Linux   
Kernel Version: 4.11, 4.12 Tree: Mainline
Regression: No
Attachments: boot.log

Description Julius Bullinger 2017-06-04 10:13:17 UTC
Created attachment 256855 [details]

Kernels 4.11+ reset BIOS settings on Thinkpad Yoga

Description of problem:
After installing Linux 4.11, my BIOS settings get reset on every restart. Booting the system after it was run with kernel-4.11.3-200.fc25.x86_64 shows a BIOS message "Configuration was reset", the system restarts and all settings are reset to default.
This doesn't happen with the 4.10 kernels.

Version-Release number of selected component (if applicable):
 * kernel-4.10.17-200.fc25.x86_64
 * kernel-4.11.2-200.vanilla.knurd.1.fc25.x86_64
 * kernel-4.11.3-200.fc25.x86_64
 * kernel-4.12.0-0.rc2.git0.1.vanilla.knurd.1.fc25.x86_64

How reproducible:

Steps to Reproduce:
1. Install kernel-4.11 or 4.12-rc2
2. Boot into it
3. Restart the system
4. "Configuration was reset" BIOS message is shown
5. The system resets
6. BIOS settings are back to default
7. Change some BIOS settings
8. Boot with an older kernel (<=4.10), and reboot
9. BIOS settings stay as set

Actual results:
see above

Expected results:
The system restarts without resetting BIOS settings

Additional info:
* Thinkpad S1 Yoga (Type 20CD)
* Tested BIOS versions 1.29 and 1.31 (latest)
Comment 1 Julius Bullinger 2017-06-04 10:15:41 UTC
Sorry, seems like this was already reported as #195951. My bad!

*** This bug has been marked as a duplicate of bug 195951 ***