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pa4wdh
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PostPosted: Tue Apr 12, 2016 3:14 pm    Post subject: BIOS or UEFI ? Reply with quote

HI All,

I just got my new laptop and the first thing to do is of course to install Gentoo on it :D

The hardware supports both BIOS and UEFI boot methods and as far as i can see grub supports both too. Is there any important reason to choose one over the other ?
Since i fail to see the benefits of UEFI my first thought would be to just use the BIOS method.

Thanks for any advice.
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MarioCorleone
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PostPosted: Tue Apr 12, 2016 4:39 pm    Post subject: Reply with quote

I had the same thought when i got my new lappy last year, I just went with bios, no issues at all.. but didn't understand it at all. It's always better to do a bit of research when you're not clear on something.
http://www.howtogeek.com/56958/ <-- Pretty good explanation on the topic. It's really up to you, your preferences.
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pa4wdh
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PostPosted: Tue Apr 12, 2016 5:20 pm    Post subject: Reply with quote

Thanks for the link MarioCorleone.
In the mean time i also found this link: https://askubuntu.com/questions/647303/uefi-or-legacy-which-is-advised-and-why
While your link does a good job at describing the two, this link points to someone who asked the same question as i did and has more focus on the differences.

Based on this information I'd still go for BIOS.
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The gentoo way of bringing peace to the world:
USE="-war" emerge --newuse @world

Free as in Freedom is not limited to software only:
Music: http://www.jamendo.com
Recipes: http://www.opensourcefood.com
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The Doctor
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PostPosted: Tue Apr 12, 2016 10:45 pm    Post subject: Reply with quote

UEFFI has some really cool toys that come with it. A bootloader for example.

I wouldn't even bother with grub. Just make the FAT32 (check that via the handbook) partition your /boot and use efibootmgr to inform the computer about your kernel. Just remember to turn off secure boot.
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C5ace
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PostPosted: Wed Apr 13, 2016 3:00 pm    Post subject: Re: BIOS or UEFI ? Reply with quote

pa4wdh wrote:
HI All,

I just got my new laptop and the first thing to do is of course to install Gentoo on it :D

The hardware supports both BIOS and UEFI boot methods and as far as i can see grub supports both too. Is there any important reason to choose one over the other ?
Since i fail to see the benefits of UEFI my first thought would be to just use the BIOS method.

Thanks for any advice.


I look after 7 or Gentoo laptops, desktops and a server. Boot disks are smaller than 2TB. Most with UEFI, Secure Boot. I only use booting from MBR using grub-static. This includes a workstation with 5 drive set up with RAID 1 for the boot partitions and RAID 5 for all other partitions. Partitions are identified by label. No hassles and very easy to install and maintain.
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Syl20
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PostPosted: Thu Apr 14, 2016 6:40 am    Post subject: Reply with quote

I wondered myself what to use when I bought my last computer. Nvidia answered for me : my graphic card (based on a GTX 650 Ti GPU) seems to have a bug, which forced me to use the good old BIOS (legacy) mode. Now, Gentoo works well, and I'm too lazy to switch to UEFI, if however a compatible firmware exists.

Some UEFI implementations don't respect very well the standards. Sometimes it's a bit hard to properly configure the bootloader. I like rEFInd. Generally, it works well.
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blugendoo
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PostPosted: Thu Apr 14, 2016 3:19 pm    Post subject: EFI / NVidia Reply with quote

Argh ! :x

I've chosen EFI for my first Gentoo installation...

This is because I've read there that NVidia and STR (maybe with some KDE-KWin version) had issues solved by EFI started PC (that may explain some freeze on my BIOS started PC with Linux Mint KDE).

With this current thread I've found many other opposite advice :cry:

Here are pages that seem to be worth something for me (and maybe you):
http://askubuntu.com/questions/264247/proprietary-nvidia-drivers-with-efi-on-mac-to-prevent-overheating/613573#613573
https://bbs.archlinux.org/viewtopic.php?pid=1522950#p1522950
https://forums.gentoo.org/viewtopic-p-7815374.html?sid=f12fae7d7d2fe09fc5b71718747df98b
http://forums.fedoraforum.org/showthread.php?t=306271


Last edited by blugendoo on Sat May 07, 2016 5:46 am; edited 1 time in total
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Syl20
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PostPosted: Fri Apr 15, 2016 1:33 pm    Post subject: Reply with quote

Thank you for these links. Perhaps I'll give UEFI another chance, one day...
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DualCpuUser
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PostPosted: Thu Apr 21, 2016 6:03 am    Post subject: Reply with quote

BIOS is dead. I haven't heard any new systems being shipped w/o UEFI F/W.

Which means, NOT ALL UEFI WILL HAVE CSM, which means 2 things for Gentoo.

1) Stop making ISO's BIOS boot, vs.UEFI
2) Hyper-V Generation 2 will present UEFI bios WITHOUT CSM
3) This REQUIRES Linux integrated modules built into the kernel OR YOU GET NO KEYBOARD.
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axl
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PostPosted: Thu Apr 21, 2016 10:02 am    Post subject: Reply with quote

CSM stands for Compatibility Support Module. it's that little bit of code in your fw that still allows you to boot in mbr mode. I do agree with Ron. Over the coming years manufacturers will remove bios completely and only EFI will remain. So sooner or later you will have to learn about GPT and EFI. And for good reason as the doctor mentioned. EFI is kinda cool.
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frostschutz
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PostPosted: Thu Apr 21, 2016 10:44 am    Post subject: Reply with quote

I'm using BIOS boot (GPT + grub) everywhere and will keep doing so until it stops working.

I do it this way because so far it worked everywhere for me without any hassle whatsoever.

I don't think this functionality will be removed any time soon, cross that bridge when it comes to...
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DualCpuUser
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PostPosted: Thu Apr 21, 2016 3:30 pm    Post subject: Reply with quote

Understand UEFI is a BIOS, just more updated and follows different design than the design originated by IBM for the org. IBM PC.
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