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How do I remove the stored boot options in NVRAM - command line or GUI?

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How do I remove the stored boot options in NVRAM - command line or GUI?
m654321

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#1

04-23-2016, 04:17 AM
My main laptop (Asus G750) appears to have NVRAM (non-volatile random access memory).

This seems to interfere with booting the computer following removal of the HDD or SSD containing the operating system, and swapping it for another drive with a different operating system.  This problem (and its solution) was previously discussed at https://www.term.dpdns.org/forums/tutor...y-enabled/ (see Section F – problem 1).  What I would like to know is how to avoid the above problem altogether. Put simply, is there a either a command line or GUI method for clearing NVRAM of its stored boot options, before I swap the the drives (containing the different operating systems)?

Many thanks in advance for any help on this one.

Mike
64bit OS (32-bit on Samsung[i] netbook) installed in [i]Legacy mode on MBR-formatted SSDs (except pi which uses a micro SDHC card):
2017 - Raspberry pi 3B (4cores) ~ [email protected] - LibreElec, used for upgrading our Samsung TV (excellent for the task)  
2012 - Lenovo G580 2689 (2cores; 4threads] ~ [email protected] - LL3.8/Win8.1 dual-boot (LL working smoothly)
2011 - Samsung NP-N145 Plus (1core; 2threads) ~ Intel Atom [email protected] - LL 3.8 32-bit (64-bit too 'laggy')
2008 - Asus X71Q (2cores) ~ Intel [email protected] - LL4.6/Win8.1 dual-boot, LL works fine with kernel 4.15
2007 - Dell Latitude D630 (2cores) ~ Intel [email protected] - LL4.6, works well with kernel 4.4; 4.15 doesn't work
(This post was last modified: 04-23-2016, 04:19 AM by m654321.)
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avj

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#2

04-23-2016, 08:17 PM
I have no experience with UEFI or NVRAM but after a little searching it appears that "efibootmgr" is capable of changing boot options.  See the following.

http://linux.die.net/man/8/efibootmgr
“I have not failed. I’ve just found 10,000 ways that won’t work.” - Thomas Edison
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m654321

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#3

04-24-2016, 04:21 AM
Avj, many thanks for your reply and taking the trouble to do a bit of searching re. efibootmgr.
I typed efibootmgr into the terminal but no GUI materialised, so I assume there is none and this is command-line only solution.
I think I might postpone applying the command-line in the link for a while as it looks a bit complicated and I'm still a very much
a linux newbie...

Cheers
Mike 
64bit OS (32-bit on Samsung[i] netbook) installed in [i]Legacy mode on MBR-formatted SSDs (except pi which uses a micro SDHC card):
2017 - Raspberry pi 3B (4cores) ~ [email protected] - LibreElec, used for upgrading our Samsung TV (excellent for the task)  
2012 - Lenovo G580 2689 (2cores; 4threads] ~ [email protected] - LL3.8/Win8.1 dual-boot (LL working smoothly)
2011 - Samsung NP-N145 Plus (1core; 2threads) ~ Intel Atom [email protected] - LL 3.8 32-bit (64-bit too 'laggy')
2008 - Asus X71Q (2cores) ~ Intel [email protected] - LL4.6/Win8.1 dual-boot, LL works fine with kernel 4.15
2007 - Dell Latitude D630 (2cores) ~ Intel [email protected] - LL4.6, works well with kernel 4.4; 4.15 doesn't work
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Wirezfree

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#4

04-24-2016, 09:37 AM
Hi,
Have no experience of this...
I just remember, when you mentioned GUI this was mentioned in a Linux Mag
https://sourceforge.net/projects/refind/
Upgrades WIP 2.6 to 2.8 - (6 X 2.6 to 2.8 completed on: 20/02/16 All O.K )
Linux Lite 3.0 Humming on a ASRock N3070 Mobo ~ btrfs RAID 10 Install on 4 Disks :)

Computers Early days:
ZX Spectrum(1982) , HP-150 MS-DOS(1983) , Amstrad CPC464(1984) ,  BBC Micro B+64(1985) , My First PC HP-Vectra(1987)
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m654321

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#5

04-24-2016, 01:02 PM
Thanks Dave - maybe prudent then if I just use the solution in the UEFI LL/Win dual-boot tutorial - at least I know what I'm playing with there and it works.
If I stray into  'unknown territory',  I'll probably only break the system and consequently waste a lot of valuable time ...

Mike
64bit OS (32-bit on Samsung[i] netbook) installed in [i]Legacy mode on MBR-formatted SSDs (except pi which uses a micro SDHC card):
2017 - Raspberry pi 3B (4cores) ~ [email protected] - LibreElec, used for upgrading our Samsung TV (excellent for the task)  
2012 - Lenovo G580 2689 (2cores; 4threads] ~ [email protected] - LL3.8/Win8.1 dual-boot (LL working smoothly)
2011 - Samsung NP-N145 Plus (1core; 2threads) ~ Intel Atom [email protected] - LL 3.8 32-bit (64-bit too 'laggy')
2008 - Asus X71Q (2cores) ~ Intel [email protected] - LL4.6/Win8.1 dual-boot, LL works fine with kernel 4.15
2007 - Dell Latitude D630 (2cores) ~ Intel [email protected] - LL4.6, works well with kernel 4.4; 4.15 doesn't work
(This post was last modified: 04-24-2016, 01:06 PM by m654321.)
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Wirezfree

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#6

04-24-2016, 04:00 PM
Just a thought.?, could you experiment in Virtualbox...
Here's a post, Arch related, but it mentions nvram and refind in the same post
Maybe going off topic, and possibly complicated

https://bbs.archlinux.org/viewtopic.php?id=158003
Upgrades WIP 2.6 to 2.8 - (6 X 2.6 to 2.8 completed on: 20/02/16 All O.K )
Linux Lite 3.0 Humming on a ASRock N3070 Mobo ~ btrfs RAID 10 Install on 4 Disks :)

Computers Early days:
ZX Spectrum(1982) , HP-150 MS-DOS(1983) , Amstrad CPC464(1984) ,  BBC Micro B+64(1985) , My First PC HP-Vectra(1987)
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m654321

Posts: 893
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#7

04-24-2016, 04:46 PM
Thanks again Dave, and also avj, for your help - much appreciated. I think I'll stick with what I
know just to be safe... ...when i've got a bit more time & feeling a bit more adventurous I might
look at it again with the ideas you've both presented.

Cheers
Mike
64bit OS (32-bit on Samsung[i] netbook) installed in [i]Legacy mode on MBR-formatted SSDs (except pi which uses a micro SDHC card):
2017 - Raspberry pi 3B (4cores) ~ [email protected] - LibreElec, used for upgrading our Samsung TV (excellent for the task)  
2012 - Lenovo G580 2689 (2cores; 4threads] ~ [email protected] - LL3.8/Win8.1 dual-boot (LL working smoothly)
2011 - Samsung NP-N145 Plus (1core; 2threads) ~ Intel Atom [email protected] - LL 3.8 32-bit (64-bit too 'laggy')
2008 - Asus X71Q (2cores) ~ Intel [email protected] - LL4.6/Win8.1 dual-boot, LL works fine with kernel 4.15
2007 - Dell Latitude D630 (2cores) ~ Intel [email protected] - LL4.6, works well with kernel 4.4; 4.15 doesn't work
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Reply
Wirezfree

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Posts: 1,486
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Joined: Mar 2014
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#8

04-24-2016, 06:14 PM
No probs... GL
Upgrades WIP 2.6 to 2.8 - (6 X 2.6 to 2.8 completed on: 20/02/16 All O.K )
Linux Lite 3.0 Humming on a ASRock N3070 Mobo ~ btrfs RAID 10 Install on 4 Disks :)

Computers Early days:
ZX Spectrum(1982) , HP-150 MS-DOS(1983) , Amstrad CPC464(1984) ,  BBC Micro B+64(1985) , My First PC HP-Vectra(1987)
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