Arch Linux

stefan

Member

Registered: 2013-03-22

Posts: 104

[solved] Message during boot disappears too fast

Hi,

there's a message during boot that I'd like to see, but it's gone too
fast.  It's not visible in `dmesg`, and also not via `journalctl -b`
(executed as root).  Also `systemctl status` reports nothing
suspicious.

From what I could see the message seems to be surrounded by a
box of asterisks `*`, but I have no chance to read what it's about.

Any ideas where to look?

Thanks
Stefan

Last edited by stefan (2016-09-03 20:31:42)

Inxsible

Forum Fellow

From: Chicago

Registered: 2008-06-09

Posts: 9,183

Re: [solved] Message during boot disappears too fast

have you tried all other options listed in the wiki ?

specifically this :  https://wiki.archlinux.org/index.php/Ge … ay_on_tty1

Last edited by Inxsible (2016-08-24 16:56:07)

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stefan

Member

Registered: 2013-03-22

Posts: 104

Re: [solved] Message during boot disappears too fast

Hi, thanks for replying

have you tried all other options listed in the wiki ?

Well, `systemd`, `dmesg`, Kernel-parameter does not have `quiet`.
I've tried Ctrl-S/Q repeatedly, and I can stop before the message
appears, but when it appears it immediately scrolls through and is
gone, even if I hit Ctrl-S/Q almost simultaneously.

what else?

specifically this :  https://wiki.archlinux.org/index.php/Ge … ay_on_tty1

Hmmm.  This has the rather adverse effect that the screen becomes all
black, clearing all messages.  Even the tty login prompt does not
appear until I hit Return.

alex.theoto

Member

From: Athens Greece

Registered: 2014-11-30

Posts: 307

Re: [solved] Message during boot disappears too fast

Try to boot by editing grub menu by pressing 'e' key at menu and at line

 linux   /boot/vmlinuz-linux...... quiet

and remove the 'quiet' option.

Also take a look at

systemctl --state=feiled --all

There might be not something serious, just some delay starting a service but I don't know why you have to press enter to goto login.

stefan

Member

Registered: 2013-03-22

Posts: 104

Re: [solved] Message during boot disappears too fast

Try to boot by editing grub menu by pressing 'e' key at menu and at line

I have to press Tab instead of `e`.  Does that mean anything?

and remove the 'quiet' option.

There is no `quiet`.

Also take a look at

systemctl --state=feiled --all

root@tauhou:~# systemctl --state=feiled --all
0 loaded units listed.
To show all installed unit files use 'systemctl list-unit-files'.
root@tauhou:~# systemctl --state=failed --all
0 loaded units listed.
To show all installed unit files use 'systemctl list-unit-files'.

stefan

Member

Registered: 2013-03-22

Posts: 104

Re: [solved] Message during boot disappears too fast

*sigh* I took a camera and filmed the boot process... I can't upload
the image, so here's the message transcribed:

:: performing fsck on '/dev/mapper/root'
********************** WARNING **********************
*                                                   *
*  The root device is not configured to be mounted  *
*  read-write!  It may be fsck'd again later.       *
*                                                   *
*****************************************************
:: mounting '/dev/mapper/root' on real root

This does *not* show up in fsck:

root@tauhou:~# journalctl -b | grep fsck
Aug 25 10:27:59 tauhou systemd[1]: Created slice system-systemd\x2dfsck.slice.
Aug 25 10:27:59 tauhou systemd-fsck[435]: /dev/sda1: clean, 79/16384 files, 43559/65536 blocks
Aug 25 10:28:42 tauhou kernel: FAT-fs (sdc1): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.

Note, `sdc1` is not the root device.

Two questions:

1. Is it a bug that the warning is not logged, i.e., should I file a
   report?  If so, then a bug of what?  fsck, systemd, whatever?

2. What to do about the warning?  When the system's running, I see

root@tauhou:~# mount | grep root
/dev/mapper/root on / type btrfs (rw,relatime,ssd,space_cache,subvolid=5,subvol=/)

so `rw` means read-write.  And is there even an `fsck` for BTRFS?

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 19,774

Re: [solved] Message during boot disappears too fast

It is not clear to me what boot loader you are using.  You will need to figure out how to change the kernel command line for the loader you are using.
Find out what the kernel command line you are using as follows

ewaller@turing ~ 1043 %cat /proc/cmdline
\vmlinuz-linux rw root=UUID=b395c435-49e5-411a-ab9c-196da7c8262c initrd=/intel-ucode.img initrd=/initramfs-linux.img acpi_backlight=native
ewaller@turing ~ 1044 %

Note the rw just before the root= clause?   If you don't have that, edit your boot loader configuration to add it.

Inxsible:  Hey, good to see you on the forums.  Keeping busy?

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stefan

Member

Registered: 2013-03-22

Posts: 104

Re: [solved] Message during boot disappears too fast

It is not clear to me what boot loader you are using.

Syslinux.

Find out what the kernel command line you are using as follows

ewaller@turing ~ 1043 %cat /proc/cmdline
\vmlinuz-linux rw root=UUID=b395c435-49e5-411a-ab9c-196da7c8262c initrd=/intel-ucode.img initrd=/initramfs-linux.img acpi_backlight=native

Ah! I have the following in `/boot/syslinux/syslinux.cfg`, `ro` at the very end!

LABEL arch
    MENU LABEL Arch Linux
    LINUX ../vmlinuz-linux
    APPEND root=/dev/mapper/root cryptdevice=/dev/disk/by-uuid/1c75222f-8ab4-410f-8381-bb9ec2e45edf:root cryptkey=/dev/disk/by-label/key:ext2:key ro
    INITRD ../initramfs-linux.img

I've copied that and created a second menu entry

LABEL arch2
    MENU LABEL Arch Linux 2
    LINUX ../vmlinuz-linux
    APPEND root=/dev/mapper/root cryptdevice=/dev/disk/by-uuid/1c75222f-8ab4-410f-8381-bb9ec2e45edf:root cryptkey=/dev/disk/by-label/key:ext2:key rw
    INITRD ../initramfs-linux.img

Booting this makes the message disappear.

Being positioned at the very end of the line, I was assuming ro/rw to
relate to the device with the key on, but thatwas obviously wrong.

Thank you very much!

Stefan

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 19,774

Re: [solved] Message during boot disappears too fast

Cool.   If it is solved, be sure to edit your first post in the thread and edit the thread title by prepending [SOLVED]

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Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
Sometimes it is the people no one can imagine anything of who do the things no one can imagine. -- Alan Turing
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Inxsible

Forum Fellow

From: Chicago

Registered: 2008-06-09

Posts: 9,183

Re: [solved] Message during boot disappears too fast

Inxsible:  Hey, good to see you on the forums.  Keeping busy?

Very !!

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There's no such thing as a stupid question, but there sure are a lot of inquisitive idiots !