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nxe9
n00b
Joined: 05 Jun 2021
Posts: 48
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 Posted: Tue Sep 06, 2022 9:53 am Post subject: Cannot boot from usb flash drive |
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Error
| Code: | | Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block |
Kernel config
https://dpaste.com/22TN7KDXP
fstab
| Code: | PARTUUID=6eb5624a-6638-694e-a34c-d5a8c1d15cf1 /boot vfat defaults,noatime 0 2
PARTUUID=0e608335-af75-0443-8e78-b758a2925a2b / ext4 noatime 0 1 |
System types are vfat and ext4
| Code: | df -Th
/dev/sdf1 vfat
/dev/sdf2 ext4 |
The value of PARTUUID is definitely ok. I double checked it. I boot with pure efi. Previously, I tried with grub without success too. My other systems boot using efi without any problems.
I suspect I'm missing some drivers that support booting from usb flash drive, but which ones? I should add that I have a arch linux usb that boots from usb with no problems, so the hardware can certainly do this. |
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alamahant
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Joined: 23 Mar 2019
Posts: 3879
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nxe9
n00b
Joined: 05 Jun 2021
Posts: 48
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| Posted: Tue Sep 06, 2022 10:37 am Post subject: |
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As far as I can see, I have everything on the list activated. I am omitting USB Network Adapters, USB Serial Converter support, USB Type-C and Thunderbolt (my mainboard doesn't have any usb-c) and USB Audio, as these points do not seem to apply to me.
| alamahant wrote: | In menuconfig search for
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is activated in my config. |
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alamahant
Advocate
Joined: 23 Mar 2019
Posts: 3879
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| Posted: Tue Sep 06, 2022 10:59 am Post subject: |
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Plz search for
| Code: |
Symbol: USB_UAS [=m] │
│ Type : tristate │
│ Defined at drivers/usb/storage/Kconfig:189 │
│ Prompt: USB Attached SCSI │
│ Depends on: USB_SUPPORT [=y] && USB [=y] && SCSI [=y] && USB_STORAGE [=m] │
│ Location: │
│ Main menu │
│ -> Device Drivers │
│ -> USB support (USB_SUPPORT [=y]) │
│ (1) -> USB Mass Storage support (USB_STORAGE [=m]) │
│
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pietinger
Moderator
Joined: 17 Oct 2006
Posts: 4236
Location: Bavaria
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| Posted: Tue Sep 06, 2022 11:03 am Post subject: |
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nxe9,
"Config_hid" is needed for your keyboard and has nothing to do with booting from an usb drive. For booting from an USB device you must have compiled all necessary modules static into your kernel. You have this - Good ! But sometimes USB devices need more time to be available, so, I assume the only you are missing is:
| Code: | | CONFIG_CMDLINE="root=PARTUUID=0e608335-af75-0443-8e78-b758a2925a2b rootwait" |
If this does not help we need the numbers behind your kernel panic error ("Kernel panic - not syncing: VFS:"); is it (0,0) or other ? |
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nxe9
n00b
Joined: 05 Jun 2021
Posts: 48
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| Posted: Tue Sep 06, 2022 4:11 pm Post subject: |
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| alamahant wrote: | Plz search for
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Simply activating option CONFIG_USB_UAS was not enough. Still not able to boot.
Fantastic . It works now.
Thank you all for your help. As usual, you have helped me. |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54300
Location: 56N 3W
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| Posted: Tue Sep 06, 2022 7:52 pm Post subject: |
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nxe9,
The kernel normally mounts root before it starts USB.
That's a problem with root on USB. rootwait fixes that.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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nxe9
n00b
Joined: 05 Jun 2021
Posts: 48
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| Posted: Wed Sep 07, 2022 8:30 am Post subject: |
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| NeddySeagoon wrote: | | The kernel normally mounts root before it starts USB. |
However, I don't think it's a question of such design but simply a question of timing. I tried to mount usb-root inside init (initramfs) and it failed. Once 'sleep(10)' was added, it started to work. |
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Installing Gentoo
