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Naib
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PostPosted: Tue Feb 13, 2018 6:42 pm    Post subject: Reply with quote

what worries me is he is talking about legacy boot settings...

its not actually definitely stated *IF* his BIOS is EFI enabled, likewise whether grub was setup as such. EQUALLY whether void was setup for EFI or not...
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PostPosted: Tue Feb 13, 2018 6:50 pm    Post subject: Reply with quote

If you don't use PXE boot, try disabling it in BIOS. i.e. don't put it in the chain.
That may not work. The mobo I referred to early had it disabled but it always tried anyway. But it only takes less than a minute to try.

The BIOS on my new MSI mobo will only try the first choice. If it fails, the BIOS reboots in an infinite loop instead of trying the second choice.
It's also supposed to support DDR-4 3200 memory. i have 2666 memory but it sees it only as 2400. I have to use the overclocking menu to select 2400 (the highest choice) or it will default to 2166. off topic, but illustrates that BIOS' have a lot of bugs.
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PostPosted: Tue Feb 13, 2018 7:15 pm    Post subject: Reply with quote

Naib wrote:
what worries me is he is talking about legacy boot settings...

its not actually definitely stated *IF* his BIOS is EFI enabled, likewise whether grub was setup as such. EQUALLY whether void was setup for EFI or not...


Agreed. My scenario was IF UEFI was enabled, and I don't see conclusive evidence anywhere in the thread. I may have missed something. I'm not a UEFI genius, I've installed it on exactly one Gentoo box.

The thing is, PXE is very definitely not controlled by grub. It's controlled by the BIOS. The only thing that fits the description of the OP's problem is if void was higher up the boot order than PXE, or if PXE was disabled before but isn't now.

I can only see this problem as being related to BIOS and boot loader settings.

As far as I understand it, boot requirements are:
UEFI:

  1. GPT partition table on the boot media
  2. Exactly one partition of type EF00
  3. The EF00 partition is formatted fat32
  4. The EF00 partition contains the kernel/boot loader and all the associated files
  5. The BIOS knows where to find the kernel/boot loader.


Old-school:

  1. One partition marked bootable
  2. Boot loader in one of two predetermined places
  3. Possible wiring or BIOS configuration to determine disk boot order.


The reason I brought up UEFI is because I don't really see a way for this situation to happen with an old-school boot. That said I suppose I can understand a BIOS which wants to be picky about which disks can be booted. Mine is. I just never saw that sort of thing until UEFI came around.
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PostPosted: Tue Feb 13, 2018 7:36 pm    Post subject: Reply with quote

I always had legacy boot enabled because Void wouldn't install in EFI mode, don't ask me why. I could enable UEFI, but I seem to be too narrow-minded to understand how to use it correctly.

There is no obvious way to remove PXE from the boot order completely - I could only move it up or down?
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PostPosted: Tue Feb 13, 2018 7:39 pm    Post subject: Reply with quote

What is needed is a definitive statement on

1) BIOS configured as EFI or legacy
2) VOID configured for EFI or legacy
3) Is VOID still bootable?
3) Gentoo configuration steps followed (EFI or legacy).

Everything is pointing to aspects of the HDD are not "waking up" so BIOS moves on to the next boot device & hence an attempted PXE... one way would be to disable that, the correct way is to sort out the boot partitions...
if EFI is used are both VOID & Gentoo efi files present in /boot/EFI ...


We really need to know the HDD layout, bios config, bootloader config (VOID and Gentoo). Which distro do you want to manage grub... Grub can boot a tonne of kernels (windows, iso, different distro's)

Quote:
lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 238.5G 0 disk
└─sda1 8:1 0 238.5G 0 part /var/tmp
nvme0n1 259:0 0 931.5G 0 disk
├─nvme0n1p1 259:1 0 130M 0 part /boot
└─nvme0n1p2 259:2 0 931.4G 0 part /

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PostPosted: Tue Feb 13, 2018 7:53 pm    Post subject: Reply with quote

OK that's valuable info.

FWIW it seems that in order to install a UEFI boot system you need to be booted from an UEFI boot disk.

I would check the condition of your chosen boot disk to make sure that the correct partition is marked as bootable, and that the BIOS is in place and correct, and check your BIOS for boot order settings.
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PostPosted: Wed Feb 14, 2018 7:24 pm    Post subject: Reply with quote

Sooo...

Code:
EFI variables are not supported on this system.


I think it's safe to assume that this is as legacy as it can get?

lsblk output:

Code:
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda      8:0    0 238,5G  0 disk
├─sda1   8:1    0     2M  0 part
├─sda2   8:2    0   497M  0 part
├─sda3   8:3    0   500M  0 part [SWAP]
└─sda4   8:4    0 237,5G  0 part /
sr0     11:0    1  1024M  0 rom 


I had removed Void before installing Gentoo because I did (edited: typo) not want to have any interferences.
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Last edited by pun_guin on Wed Feb 14, 2018 8:58 pm; edited 1 time in total
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Naib
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PostPosted: Wed Feb 14, 2018 8:44 pm    Post subject: Reply with quote

right. what does fdisk show, primarily looking for the partition that is marked for boot

NOTE: this is efi so there is no boot flag
Code:
fdisk -l
Disk /dev/nvme0n1: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 173E81AB-ED99-4127-A026-DE6CA8736408

Device          Start        End    Sectors   Size Type
/dev/nvme0n1p1   2048     268287     266240   130M EFI System
/dev/nvme0n1p2 268288 1953523119 1953254832 931.4G Linux filesystem


Disk /dev/sda: 238.5 GiB, 256060514304 bytes, 500118192 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x000effdf

Device     Boot Start       End   Sectors   Size Id Type
/dev/sda1        2048 500117503 500115456 238.5G 83 Linux

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pun_guin
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PostPosted: Wed Feb 14, 2018 9:08 pm    Post subject: Reply with quote

From fdisk -l /dev/sda (I only have one SSD):

Code:
Festplatte /dev/sda: 238,5 GiB, 256060514304 Bytes, 500118192 Sektoren
Einheiten: Sektoren von 1 * 512 = 512 Bytes
Sektorgröße (logisch/physikalisch): 512 Bytes / 512 Bytes
E/A-Größe (minimal/optimal): 512 Bytes / 512 Bytes
Festplattenbezeichnungstyp: gpt
Festplattenbezeichner: DB852F98-B31C-4CBF-B8ED-8B0B7D4BF301

Gerät       Anfang      Ende  Sektoren  Größe Typ
/dev/sda1     2048      6143      4096     2M BIOS boot
/dev/sda2     6144   1023999   1017856   497M Linux-Dateisystem
/dev/sda3  1024000   2047999   1024000   500M Linux-Dateisystem
/dev/sda4  2048000 500116143 498068144 237,5G Linux-Dateisystem


I set /dev/sda1 as the boot partition and this seems to have worked. /boot is mounted and it contains my current kernel.
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PostPosted: Wed Feb 14, 2018 9:26 pm    Post subject: Reply with quote

pun_guin,

BIOSes are somewhat simplistic. At one time they were 64kB max. A single segment
They read the partition table, check for a bootable flag then boot from the drive, or not.

Checking varies. Some don't check at all.
Others don't mind how many partition have the bootable flag set.
Yet others insist that its only set on exactly one partition.
The bootable flag says noting about the partition its attached to. Your sda1 is the BIOS_Boot partition, which grub uses raw.
It does not hold your kernel.

I suspect what you have is (a novel to me case), where if the bootable flag is not set, that boot option is skipped and the drive is pushed to the bottom of the list, after all else has failed.

The bootable flag is just for the BIOS. Nothing else cares.
Well, Windows does sometimes.
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PostPosted: Wed Feb 14, 2018 9:33 pm    Post subject: Reply with quote

NeddySeagoon,

NeddySeagoon wrote:
I suspect what you have is (a novel to me case), where if the bootable flag is not set, that boot option is skipped and the drive is pushed to the bottom of the list, after all else has failed.


I just tried to set the bootable flag via fdisk, but a reboot showed no improvement.
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PostPosted: Wed Feb 14, 2018 9:49 pm    Post subject: Reply with quote

Any reason you chose to have GPT partitioning while using LEGACY BIOS? Annoying combination. Microsoft does not support legacy BIOS and GPT partitioning due to the complexity

Sda1 must be grub2 boot partition (to deal with gpt partitioning)
Is sda2 your /boot with your kernel?
Sda3 swap
Sda4 is /<root>
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Last edited by Naib on Wed Feb 14, 2018 9:55 pm; edited 1 time in total
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PostPosted: Wed Feb 14, 2018 9:54 pm    Post subject: Reply with quote

No special reason - the Handbook suggests (unless I plan to dual-boot with Windows) that I should either use UEFI or BIOS+GPT, so I thought I might want to do exactly that.
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PostPosted: Wed Feb 14, 2018 9:59 pm    Post subject: Reply with quote

There still seems to be missing information to help you through this... Partitions for one, how grub was setup...

Could you read through this as see if it aligns with what you did

https://wiki.gentoo.org/wiki/GRUB2#BIOS_with_GPT
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PostPosted: Wed Feb 14, 2018 10:12 pm    Post subject: Reply with quote

+1 on nothing valuable in your sector 1. It's 2M, nothing would fit IMO. My /boot contains 51M with 3 kernels, grub and a bootx64.efi. 2M is not big enough to hold a kernel on a typical system.

The handbook's recommendation of a 2M ef00 partition is, IMO, very misleading and I struggled with it years ago. If it's still there I think it should be changed to something realistic.

I used GPT long before I used UEFI boot. That said I haven't installed Windows on bare metal in more than 20 years, and then not for me.

I would recommend doing this as root:
Code:

mount /boot
cp -rax /boot /boot2


Then boot into system rescue cd (or other alternate Linux media) and open 'gdisk /dev/sda'

  1. delete sda1
  2. delete sda2
  3. Create sda1 as taking all the space from 2048 to 1023999 (the space previously occupied by sda1 and sda2)
  4. Make it Linux filesystem.
  5. Save and quit.
  6. mkfs.ext3 /dev/sda1
  7. mount /dev/sda4 /mnt/gentoo
  8. mount /dev/sda1 /mnt/gentoo/boot
  9. cp -rax /mnt/gentoo/boot2 /mnt/gentoo/boot
  10. reboot and remove external boot media


Edit: You may have to tweak /mnt/gentoo/etc/fstab such that the /boot partition is /dev/sda1. But that could actually happen after the reboot when you're in your normal system again I think.

Or maybe you'd have to chroot and redo grub? Not sure. I came into grub way later than most, having been stuck on lilo for decades
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PostPosted: Wed Feb 14, 2018 10:19 pm    Post subject: Reply with quote

Naib wrote:
Could you read through this as see if it aligns with what you did

https://wiki.gentoo.org/wiki/GRUB2#BIOS_with_GPT


I used parted and I (think I) did all of this as it was mostly a part of the installation recommendations anyway:

Code:
mount /boot
grub-install /dev/sda
set 1 bios_grub on


I just checked parted again and there was no boot flag, only boot_grub ... after changing that, all flags seem to be where they belong (other than I don't really know what an esp is):

Code:
Modell: ATA KINGSTON RBUSC18 (scsi)
Festplatte  /dev/sda:  256GB
Sektorgröße (logisch/physisch): 512B/512B
Partitionstabelle: gpt
Disk-Flags:

Nummer  Anfang  Ende    Größe   Dateisystem     Name    Flags
 1      1049kB  3146kB  2097kB                  grub    bios_grub
 2      3146kB  524MB   521MB   ext4            boot    boot, esp
 3      524MB   1049MB  524MB   linux-swap(v1)  swap
 4      1049MB  256GB   255GB   xfs             rootfs


Still, no improvement. :?
I probably made a whole mistake quite early in my installation procedure.
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PostPosted: Wed Feb 14, 2018 11:04 pm    Post subject: Reply with quote

1clue wrote:
+1 on nothing valuable in your sector 1. It's 2M, nothing would fit IMO. My /boot contains 51M with 3 kernels, grub and a bootx64.efi. 2M is not big enough to hold a kernel on a typical system.

The handbook's recommendation of a 2M ef00 partition is, IMO, very misleading and I struggled with it years ago. If it's still there I think it should be changed to something realistic.


The 2M partition is grub's way of dealing with a GPT partition table WITH a legacy BIOS. it needs somewhere to write its stage2 data.
This needs to be of type ef01 otherwise it won't work completely - it appears to be set that was as fdisk is reporting it is a grub drive


pun_guin wrote:


Still, no improvement. :?
I probably made a whole mistake quite early in my installation procedure.

Maybe... but it should be recoverable... there are very VERY few circumstances that need a start from scratch with Gentoo

My 1st gentoo install was over a weekend and I have to chroot back in a couple of times and essentially rewind some steps
My 2nd gentoo install (due to changing to 64bit) actually resulted in a corrupted disk (Uber convinced me to try openRC as it just appeared in teh tree BUT a needed dependency wasn't pushed to the tree and it resulted in a nasty spinlock and corrupted root.)


Right now the gentoo install is valid, it is part of the configuration that may (or may not) be responsible for what you are experiencing
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PostPosted: Thu Feb 15, 2018 12:04 am    Post subject: Reply with quote

Naib wrote:
Maybe... but it should be recoverable...


That's what I was promised here. :D
Seriously though, I probably could just start from scratch (that would only make me lose time, I did not start anything productive on this machine yet other than trying to set up my environments). However, chances are that this would not necessarily fix my grub issue and I am genuinely curious now... :)
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PostPosted: Thu Feb 15, 2018 12:16 am    Post subject: Reply with quote

Two layouts:

First, EFI boot, monolithic filesystem (no separate /boot , swap on a swapfile SSD
Code:
gentoo ~ # fdisk -l /dev/sda
Disk /dev/sda: 232.9 GiB, 250059350016 bytes, 488397168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: B71B8547-F661-4A0E-A610-5FE0BDF75913

Device       Start       End   Sectors   Size Type
/dev/sda1     2048   2099199   2097152     1G EFI System
/dev/sda2  2099200 488392703 486293504 231.9G Linux filesystem
gentoo ~ # df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda2       228G   59G  158G  27% /
devtmpfs         10M     0   10M   0% /dev
tmpfs           698M  1.3M  697M   1% /run
cgroup_root      10M     0   10M   0% /sys/fs/cgroup
shm             3.5G     0  3.5G   0% /dev/shm
/dev/sda1      1022M  2.3M 1020M   1% /boot/efi
/dev/sdc2       4.6T  1.6T  2.8T  37% /video
tmpfs            18G     0   18G   0% /var/tmp/portage

Second. legacy boot with grub-legacy 10,000 RPM hard disk
Code:
MSI ~ # fdisk -l /dev/sda
Disk /dev/sda: 232.9 GiB, 250059350016 bytes, 488397168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x000d25aa

Device     Boot   Start       End   Sectors   Size Id Type
/dev/sda1  *       2048   2097151   2095104  1023M 83 Linux
/dev/sda2       2097152   4194303   2097152     1G 82 Linux swap / Solaris
/dev/sda3       4194304 488396799 484202496 230.9G 83 Linux
MSI ~ # df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda3       228G   90G  127G  42% /
devtmpfs         10M     0   10M   0% /dev
tmpfs           799M  1.2M  798M   1% /run
cgroup_root      10M     0   10M   0% /sys/fs/cgroup
shm             4.0G     0  4.0G   0% /dev/shm
/dev/sda1      1007M  155M  802M  17% /boot
/dev/sr0        482M  482M     0 100% /mnt/cdrom
tmpfs            12G     0   12G   0% /var/tmp/portage
/dev/sdb1       1.9T  857G 1006G  47% /video

Notice the asterix indicating boot partition. Gparted can set this for you and I'm pretty sure that it's on sysrescuecd.
If it's a fat32 partition you will need fat32 filesystem BUILT_IN the kernel NOT as module.

Note to Self: You forgot to mount the swap partition, dummy.
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PostPosted: Thu Feb 15, 2018 12:17 am    Post subject: Reply with quote

could you provide the output of:

Code:
gdisk -l /dev/sda


the bios_grub flag is set, but is the partition type correct.
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PostPosted: Thu Feb 15, 2018 12:29 am    Post subject: Reply with quote

Sure:

Code:
GPT fdisk (gdisk) version 1.0.1

Partition table scan:
  MBR: protective
  BSD: not present
  APM: not present
  GPT: present

Found valid GPT with protective MBR; using GPT.
Disk /dev/sda: 500118192 sectors, 238.5 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): DB852F98-B31C-4CBF-B8ED-8B0B7D4BF301
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 500118158
Partitions will be aligned on 2048-sector boundaries
Total free space is 4029 sectors (2.0 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048            6143   2.0 MiB     EF02  grub
   2            6144         1023999   497.0 MiB   EF00  boot
   3         1024000         2047999   500.0 MiB   8300  swap
   4         2048000       500116143   237.5 GiB   8300  rootfs


EF00 is what it should be, right?
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PostPosted: Thu Feb 15, 2018 2:59 am    Post subject: Reply with quote

Partition 1 should be EF01 according to Naib. I haven't verified that.

If what he's saying is correct then don't do my partition mangling from my prior post.
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PostPosted: Thu Feb 15, 2018 3:13 am    Post subject: Reply with quote

Tony0945 wrote:
Note to Self: You forgot to mount the swap partition, dummy.


Swap won't show up in any of the charts you posted. Use
Code:
free -h
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PostPosted: Thu Feb 15, 2018 3:34 am    Post subject: Reply with quote

1clue wrote:
Tony0945 wrote:
Note to Self: You forgot to mount the swap partition, dummy.


Swap won't show up in any of the charts you posted. Use
Code:
free -h

I am a double dummy! Mea culpa.
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PostPosted: Thu Feb 15, 2018 3:44 am    Post subject: Reply with quote

1clue wrote:
Partition 1 should be EF01 according to Naib. I haven't verified that.

If what he's saying is correct then don't do my partition mangling from my prior post.

On a working EFI boot system:
Code:
gentoo ~ # gdisk /dev/sda
GPT fdisk (gdisk) version 1.0.1

Partition table scan:
  MBR: protective
  BSD: not present
  APM: not present
  GPT: present

Found valid GPT with protective MBR; using GPT.

Command (? for help): p
Disk /dev/sda: 488397168 sectors, 232.9 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): B71B8547-F661-4A0E-A610-5FE0BDF75913
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 488397134
Partitions will be aligned on 2048-sector boundaries
Total free space is 6445 sectors (3.1 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048         2099199   1024.0 MiB  EF00
   2         2099200       488392703   231.9 GiB   8300

EF00, it's mounted as /boot/efi. Root and /boot are on the second partition.
bootx64.efi is under /boot/efi/EFI/BOOT. It's booting refind not grub. That may make a difference between EF00,EF01,EF02 ?

EDIT: Yes, see this link https://stackoverflow.com/questions/32931124/boot-partition-type-to-use-for-gpt-partition-table
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