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Why verbose ??

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My laptop is Lenovo x220( hd4400 & cpu i5-2520M), I've installed 10.12 successfully. My question is: If I boot without -v flag, it will not startup successful, black screen. If I add -v flag, it will startup successfully! Why?? As my understood, -v just turn on verbose, it will affect nothing. But the fact isn't what I thought. So, I wanna to know why?? What is the deep reason?? How can I fix it??
 

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My laptop is Lenovo x220( hd4400 & cpu i5-2520M), I've installed 10.12 successfully. My question is: If I boot without -v flag, it will not startup successful, black screen. If I add -v flag, it will startup successfully! Why?? As my understood, -v just turn on verbose, it will affect nothing. But the fact isn't what I thought. So, I wanna to know why?? What is the deep reason?? How can I fix it??

The i5-2520M does not have HD4400. It has HD3000. The -v flag can affect timing, and therefore in a buggy setup can make a difference.
 
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The i5-2520M does not have HD4400. It has HD3000. The -v flag can affect timing, and therefore in a buggy setup can make a difference.

First, I typed wrong, in fact, I install 10.12 with HD3000 settings( almost same in 10.11). So, the there should no buggy installation. Second, I can't understand what is "timing"?? Further, how can I fix it??
 
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The i5-2520M does not have HD4400. It has HD3000. The -v flag can affect timing, and therefore in a buggy setup can make a difference.

First, I typed wrong, in fact, I install 10.12 with HD3000 settings( almost same in 10.11). So, the there should no buggy installation. Second, I can't understand what is "timing"?? Further, how can I fix it??
 

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First, I typed wrong, in fact, I install 10.12 with HD3000 settings( almost same in 10.11). So, the there should no buggy installation. Second, I can't understand what is "timing"?? Further, how can I fix it??

You will need to provide actual information...

Attach ioreg as ZIP: http://www.tonymacx86.com/audio/58368-guide-how-make-copy-ioreg.html. Please, use the IORegistryExplorer v2.1 attached to the post! DO NOT reply with an ioreg from any other version of IORegistryExplorer.app.

Provide output (in Terminal):
Code:
kextstat|grep -y acpiplat
kextstat|grep -y appleintelcpu
kextstat|grep -y applelpc
kextstat|grep -y applehda

Attach EFI/Clover folder as ZIP (press F4 at main Clover screen before collecting). Please eliminate 'themes' directory. Provide only EFI/Clover, not the entire EFI folder.

Attach output of (in Terminal):
Code:
sudo touch /System/Library/Extensions && sudo kextcache -u /

Compress all files as ZIP. Do not use external links. Attach all files using site attachments only.

--

Don't forget to fix your profile/signature.
 
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FYI.
 

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FYI.
 

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RehabMan

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You did not provide kextcache output. Please read the request carefully.

Note: USB WiFi is not recommended.
 
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You did not provide kextcache output. Please read the request carefully.

Note: USB WiFi is not recommended.

I've uploaded kextcache output in second post. I test it without USB wifi.
 

RehabMan

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I've uploaded kextcache output in second post. I test it without USB wifi.

All kexts should be installed to the system volume.
Your drivers64UEFI has quite a bit of unnecessary components.
 
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