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T430 BIOS update 2.75 (Spectre)

T430 and later, plus T530 and later series specific matters only
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thinkquan
Posts: 15
Joined: Fri May 08, 2015 3:17 am
Location: Markham, Canada

T430 BIOS update 2.75 (Spectre)

#1 Post by thinkquan » Thu Mar 22, 2018 2:39 pm

System Update is pushing out BIOS 2.75 for my T430. It appears to be related to CVE-2017-5715.

For those of you that have applied the update, what are your experiences? Are there any significant performance changes on your ThinkPad?

Google has not turned up much on user reports for this BIOS update. Should I apply this now, or wait for more reports on it?


https://pcsupport.lenovo.com/cz/en/prod ... s/ds029252

mike.s
Posts: 2
Joined: Mon Mar 26, 2018 1:50 am
Location: Mönchengladbach, Germany

Re: T430 BIOS update 2.75 (Spectre)

#2 Post by mike.s » Mon Mar 26, 2018 1:59 am

I inadvertently updated the BIOS via "Lenovo System Update". The T430 (2349KAG) has very slow performance now, operating Windows 10 (Version: 1709, Build: 16299.344). The response and boot up time is significant slower since the applied update.
A rollback to older BIOS can't fix the performance issue.

cheers,
Mike


---
Lenovo T430 (2349KAG)
i7-3520M(3.6GHz)
8GB RAM
Samsung SSD 850 Pro
14in 1600x900 LCD
NVIDIA NVS 5400M 2GB
DVD
Intel 802.11agn wireless
1Gb Ethernet
UltraNav
Secure Chip
Fingerprint reader
Camera
9c Li-Ion
Win10 Pro 64

mike.s
Posts: 2
Joined: Mon Mar 26, 2018 1:50 am
Location: Mönchengladbach, Germany

Re: T430 BIOS update 2.75 (Spectre)

#3 Post by mike.s » Mon Mar 26, 2018 7:59 am

**EDIT**

I was able to get a workaround to fix the massive performance issue:

1st: Open a CMD (command promt)

2nd: type in the 1st command and press enter:

Code: Select all

reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management" /v FeatureSettingsOverride /t REG_DWORD /d 3 /f
3rd: type in the 2nd command:

Code: Select all

reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management" /v FeatureSettingsOverrideMask /t REG_DWORD /d 3 /f
4th: Last, but not least: Reboot your PC
Please keep in mind this will disable the spectre fix buildin into Windows.
##############################################################
#Testet on Windows 10 Pro x64 (Version: 1709, Build: 16299.344)#
##############################################################

To reactivate the Spectre patch paste the following lines separated into cmd:

Code: Select all

reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management" /v FeatureSettingsOverride /t REG_DWORD /d 0 /f

reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management" /v FeatureSettingsOverrideMask /t REG_DWORD /d 3 /f

thinkquan
Posts: 15
Joined: Fri May 08, 2015 3:17 am
Location: Markham, Canada

Re: T430 BIOS update 2.75 (Spectre)

#4 Post by thinkquan » Mon Mar 26, 2018 7:01 pm

Thanks for this!

Does the Lenovo BIOS update make updates to Windows as well? Or is the Windows Spectre fix something that is issued separately through Windows Update?

From your report, it looks like the BIOS + Winodws fixes are not playing well with each other. Did you measure your before and after boot times?

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