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Old 06-01-2016, 04:37 PM   #1
edencorbin
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Secure boot and UEFI


I'm planning on installing linux onto a dedicated hard drive in my pc. I already have a windows 10 installation on a different hard drive I plan to simply unplug to make installation simple, then plug it back in and choose boot order in BIOS (no care or desire to have slick grub menu with Win 10 on it).

My question is regarding Secure boot and UEFI, I'm running a z87x-ud4h motherboard, and have boot mode as UEFI and Legacy, secure boot is enabled.

I was hoping to install Ubuntu Mate 16.x, and if possible then go ahead and dual boot (from my linux drive) Manjaro. I've been reading a few horror stories and mixed threads on what to do about secure boot. Should I turn secure boot off? Can I leave it on? What about the UEFI and Legacy option, should that work fine?

I could just go trying things, but I really don't want to hose my Windows install in the process.

Thanks,
 
Old 06-01-2016, 04:39 PM   #2
keefaz
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Yes, turn secure boot off and keep UEFI, I have asus z87 myself and it's what I did
 
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Old 06-01-2016, 04:42 PM   #3
edencorbin
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Thumbs up

Quote:
Originally Posted by keefaz View Post
Yes, turn secure boot off and keep UEFI, I have asus z87 myself and it's what I did
Any chance you also were dealing with a seperate Windows install on your PC? I think it should be unaffected by turning secure boot off. Thanks for the tip.
 
Old 06-01-2016, 04:45 PM   #4
keefaz
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No Windows here, sorry. The setting for secure boot off is called 'OS Type > Other OS' on mine (I just checked manual)

Anyway it's quick test, just set secure boot off (Other OS on asus z87), then try to boot Windows, see if it works

Last edited by keefaz; 06-01-2016 at 04:47 PM.
 
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Old 06-01-2016, 05:04 PM   #5
yancek
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If you are planning to dual boot windows 10 with Ubuntu, I would suggest you read the Ubuntu documentation at the link below which explains some potential problems. First one is you need both systems UEFI or both MBR so you need to determine that first.

https://help.ubuntu.com/community/UEFI
 
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Old 06-01-2016, 06:56 PM   #6
jefro
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http://www.pcworld.com/article/30263...ndows-pcs.html
 
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Old 06-01-2016, 11:17 PM   #7
Doug G
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Windows 10 and Centos7 (and Fedora) dual-boot fine with UEFI/Secure Boot enabled. No bios changes necessary.

I don't think there is any risk to windows if you disable secure boot, but upcoming policy changes may remove the ability to disable secure boot in future hardware. https://msdn.microsoft.com/en-us/win...ng-secure-boot
 
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Old 06-02-2016, 12:10 PM   #8
edencorbin
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Not dual booting

Thanks for all the replies. I'm installing on a separate hard drive, selecting OS through the bios, with no boot loader aware of both OS's, therefore I don't think I'm dual booting technically. That being the case, the dual boot issues shouldn't apply, and I should be fine, just disabling secure boot and proceeding with any UEFI compatible distros, no?

Last edited by edencorbin; 06-02-2016 at 12:13 PM.
 
Old 06-02-2016, 12:13 PM   #9
keefaz
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Yes, just try it. If your Windows boots fine with no secure boot, it should be ok
 
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Old 06-02-2016, 12:24 PM   #10
scrooge74
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Hope you don't find the hard way what happened to me. Turns out that even if I only installed Linux on this Aspire E-11 I had to use uefi for it to work properly. Legacy BIOS was a total nightmare from not booting properly to all kind of issues.

Once i realized this, and installed using UEFI no more issues.
 
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Old 06-02-2016, 12:28 PM   #11
edencorbin
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Don't want to learn the hard way

Quote:
Originally Posted by scrooge74 View Post
Hope you don't find the hard way what happened to me. Turns out that even if I only installed Linux on this Aspire E-11 I had to use uefi for it to work properly. Legacy BIOS was a total nightmare from not booting properly to all kind of issues.

Once i realized this, and installed using UEFI no more issues.
I'd love not to find out the hard way. I disabled secure boot and am back in windows with no problems. For boot mode I have UEFI and Legacy selected, so, are you saying I should select install in UEFI mode? I just checked and it looks like my Windows install is not in UEFI mode, so actually I think in my case, I can similarly should install linux not in UEFI mode.

Last edited by edencorbin; 06-02-2016 at 12:46 PM.
 
Old 06-03-2016, 08:03 AM   #12
scrooge74
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For this laptop it ended working properly using an UEFI install. I could not reboot or power off properly. Had issues with touchpad. After disabling secure boot I reinstalled using UEFI no more problems.

That way you can dual boot or as in my case, wipe out Windows and install LUBUNTU (I only have 2 GB of RAM and it is shared with the video card). MATE would run good, but a bit sluggish. OPERA + LXDE excellent combination for this little laptop.
 
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Old 06-03-2016, 08:50 AM   #13
TxLonghorn
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If Windows is not installed in UEFI mode, you definitely do not want to install linux in UEFI mode.
- (as yancek mentioned previously)

Identifying Your Windows Boot Mode:
You can boot into Windows and check using these instructions -
Press the Windows + R keys to open the Run dialog, type msinfo32, and press Enter.
In the right pane of System Summary in System Information, see if the BIOS Mode value says Legacy or UEFI.


http://www.eightforums.com/attachmen...o32_legacy.jpg

http://www.eightforums.com/tutorials...gacy-mode.html

Then be sure that you are installing linux in Legacy mode. Before installing, enter the command:
Code:
[ -d /sys/firmware/efi ] && echo "Currently in EFI mode" || echo "Currently in Legacy mode"
The next question is: Is your partitioning on the new hard drive GPT or msdos?

Last edited by TxLonghorn; 06-03-2016 at 09:01 AM.
 
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Old 06-17-2016, 11:52 PM   #14
edencorbin
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Weeks later I finally got the nerd nads to go through with the install. And it went great, I disabled secure boot prior, left boot mode as UEFI and Legacy, and installed Ubuntu 16 on the new drive, no hitches. Plugged old drives in, adjusted boot order for preference, re synced the system clock after booting into Windows 10 and everything is is in order. Now to see about installing Manjaro on the linux drive. Thanks for the tips, very helpful community.
 
Old 06-18-2016, 03:33 AM   #15
beachboy2
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edencorbin,

Quote:
....very helpful community.
Indeed it is.

Please go to your original post, click on the Thread Tools tab at the top, then click on Mark this thread as solved.

Thanks.
 
  


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