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Old 01-19-2015, 02:08 PM   #1
smokey2014
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Booting to Linux on a win8 UEFI PC


Booting to CentOS Linux problem. I have an HP desktop PC with an AMD CPU and win8.1 installed on it with UEFI as the boot process. The CentOS7 DVD indicates that I have installed the CentOS successfully. When I boot the PC it does take me to a menu offering CentOS and Win8. Win 8 will boot correctly. However, when I try to boot to CentOS I get a screen that says “Kernel not found”. The boot loading process continues until it ultimately brings up a terminal login screen. When I try to login with my password and usr name it tells me that they are wrong. I suspect the Kernel not found is the real problem but I can't get into the CentOS program to see if GRUB or any of the other programs are missing or defective. So far I have not disabled the UEFI since I didn't think I needed to. Any suggestions?
 
Old 01-20-2015, 07:09 AM   #2
yancek
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Can you boot the CentOS DVD or any Linux Live CD and go to the site below to download and run the bootinfoscript? You need to run it on a Linux system and it will provide details on boot files/partitions and other related information in a results.txt script which you can post here. I don't use UEFI or CentOS but, from what I have read it creates problems if both systems are not UEFI. If you installed CentOS in UEFI and have its efi files on the efi partition then it would be something else. I've also read posts about restrictions that are specific to newer HP computers with windows and efi so you might take a look at the various options in the BIOS.
 
Old 01-20-2015, 08:56 AM   #3
Ihatewindows522
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Quote:
Originally Posted by smokey2014 View Post
Booting to CentOS Linux problem. I have an HP desktop PC with an AMD CPU and win8.1 installed on it with UEFI as the boot process. The CentOS7 DVD indicates that I have installed the CentOS successfully. When I boot the PC it does take me to a menu offering CentOS and Win8. Win 8 will boot correctly. However, when I try to boot to CentOS I get a screen that says “Kernel not found”. The boot loading process continues until it ultimately brings up a terminal login screen. When I try to login with my password and usr name it tells me that they are wrong. I suspect the Kernel not found is the real problem but I can't get into the CentOS program to see if GRUB or any of the other programs are missing or defective. So far I have not disabled the UEFI since I didn't think I needed to. Any suggestions?
I assume you're running CentOS 6.5? It's the only scenario that would make sense from what I read on the CentOS wiki.
 
Old 01-20-2015, 09:52 AM   #4
zafar_dandoti
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Disable the safeboot option in bios settings.
 
Old 01-20-2015, 04:16 PM   #5
jefro
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Centos 7 is reported to work without disabling anything. http://wiki.centos.org/HowTos/UEFI Some uefi may not be standard.

I'd look at the fedora pages maybe for clues as to what is going on. I assume that what you say is Grub is saying it can't find kernel.
 
Old 01-21-2015, 10:29 PM   #6
l33y
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It sounds like installing Linux dual boot on Windows 8.1 with UEFI is still problematic? I went through hell about 9 months ago trying to install it on my new ASUS laptop. I finally gave up and went back to an old Dell Optiplex with BIOS.

It would be good to find a good step by step process for doing it. I would consider switching Linux distros, for one compatible with UEFI, with comprehensive instructions on how to do it.
 
Old 01-22-2015, 10:45 AM   #7
smokey2014
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Booting to CentOS Linux problem

All
My apologies to all. When I typed my CentOS log in problem about a WIN8 UEFI desktop, I inadvertently typed in that during the boot process the screen showed "No kernel found". Actually the screen showed "No controller found". It is not clear to me exactly what the controller does in CentOS.
As for the comment about "some UEFI not being standard". This is one thing that concerns me because this desktop has an AMD CPU, not an Intel, plus I know HP has modified the MS WIN8 on this PC. I have however upgraded to Win8.1
The CentOS version is 7.0-1406-x86_64. The write up on this version of CentOS states that it is designed for use with UEFI and in fact it was the only Linux Distro I have tried that actually went into the install process and did appear to install. Ubuntu 14.04 which also has UEFI capability built into it hangs everytime during the install process.
Lastly, some added info. I have been able to get to the GRUB cursor but no GRUB commands are recognized.
Bob
 
Old 01-22-2015, 12:30 PM   #8
John VV
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Microsoft's " secureboot" is a version of"UEFI "
but NOT any standard version , a mangled thing to stop other operating systems from booting ( about the only thing it is GOOD at)

add to that that different manufactures use DIFFERENT versions of this "thing"
there will be problems

disable it
 
Old 01-22-2015, 12:45 PM   #9
yancek
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http://sourceforge.net/projects/bootinfoscript/

The link above is to the bootinfoscript site which I referred to in my earlier post and then forgot to post the link. If you can boot your CentOS medium and download and run the script per the instructions in the link in the Description box on that page, you can post the results here and someone might be able to help.

So your windows 8.1 is using UEFI, correct? Then you need to install CentOS in UEFI. Did you do that or did you have that option?

What grub commands did you try?
Also, I have read on other sites that HP has made some modifications which apparently make it more difficult to use non-windows systems. I don't use UEFI on my HP so can't verify that.
 
1 members found this post helpful.
Old 01-22-2015, 09:48 PM   #10
jefro
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Wonder if it is the keyboard deal. http://www.linuxquestions.org/questi...nd-4175457108/
 
  


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