x201 tablet core i7 slow boot

[charlesd]

Hello

After I upgraded by motherboard to a i7, I played with the various bios settings. It took some time to manually clear them all, so I just unplugged the CMOS battery between reboots.

I'm not sure what I did or how I did it, but after clearing some settings by unplugging the battery I started getting a very slow boot.

The computer has a black screen for about 15 seconds before booting normally with another 10 second delay, which I find very irritating, so I got myself another motherboard and put this one in my spare X201 tablet.

I wonder if that could be fixed. I looked for more information, someone said he had this problem after updating the BIOS, but it did not happen after a BIOS update. I tried downgrading the BIOS but it doesn't help.

I found someone with similar problems (but 15 minutes instead of 15 seconds: http://jackngblog.blogspot.com/2011/03/ ... en-on.html) who had to disable AMT in the BIOS, so I tried checking the settings in the BIOS, but it freeze when I enter "Config".

Instead, I found some tools to tweak the settings from Windows 7, tried turning TPM and AMT on and off, nothing helped.

There are similar reports on lenovo forums when using Bitlocker (http://forums.lenovo.com/t5/X-Series-Ta ... d-p/200994) but not for 15 seconds - and I don't use Bitlocker.

I was just playing in the BIOS. Has anyone had that problem before? Any suggestion? (I tried clearing the BIOS, which did not help)

[RealBlackStuff]

Since you changed your motherboard, maybe it came with an almost dead CMOS battery, or the one you put in is nearly dead?
Try a new one, or one with at least 3.0V.
By replacing the CMOS battery you force the X201 into going into BIOS when you switch on again, to set date/time.

[charlesd]

Hello

Thanks, I will try to replace the battery, even if it seems to be holding the time and date quite well (I have seen stranger things)

What happens when I unplug the CMOS battery (as I already tried that instead) : the x201 goes into bios mode, to ask me again to setup date and time, but:
- it still takes these 15 seconds
- as soon as I select "Config" instead, it hangs

I just don't understand why it hangs when I select an option in BIOS mode.I tried waiting a few minutes, but the fan get to the maximum speed and I'm worried about burning the CPU

My best idea is some security (TPM or AMT) related bug, because if after the long boot I start Windows 7, the AMT driver complain it can't talk to the AMT chip, while using the SRCMOS dos tool (http://download.lenovo.com/ibmdl/pub/pc ... tr02ww.txt) or the windows BIOS tools (http://download.lenovo.com/ibmdl/pub/pc ... loy_en.pdf) I have set it to enabled.

When I set AMT to disabled, it does 2 reboots to remove the option, just like on my main x201, but still does not help.

I know I should not have played with the BIOS settings, but I never expected the bios hanging when I select an option, even after removing the CMOS battery.

[charlesd]

After additional research, I'm not the only one getting that problem: http://forums.lenovo.com/t5/X-Series-Th ... d-p/811249 seems to be for the exact same problem.

I also found:
http://forum.thinkpads.com/viewtopic.ph ... w=previous

http://forum.thinkpads.com/viewtopic.php?t=110304

http://forum.thinkpads.com/viewtopic.php?t=89739

If I can't fix it, I will just use the motherboard to practice with the mini PCIE port surgery (http://forum.thinkpads.com/viewtopic.ph ... 08#p753708)

[lex777]

Hello, charlesd!
Unfortunately, I have the same problem... Did you fix it?