Things are looking a bit more promising now...
Le 03/04/2020 21:05, Kent West a écrit :
>
>
> On Fri, Apr 3, 2020 at 1:41 PM Bernard <bdebreil@free.fr
> <mailto:bdebreil@free.fr>> wrote:
>
>
> Having done some minor resettings on alsamixer with no results, I
> thought I had to reboot.
>
> But : "Oh no, something has gone wrong..."
>
> So, I am writing this message from my other laptop running Ubuntu 14.04
>
> I tried to reboot in rescue mode, but I don't know what to do from
> there. 'startx' says that it doesn't have the proper files to launch
> startx as root.
>
> login
> bd
>
> says : wrong login (doesn't even ask a pswd)
>
>
> It's unclear how far you're getting.
>
> Can you boot normally and get to a login prompt on a text-only screen?
>
> --
> Kent
>
Thanks for your reply. To get login prompt and text screen, I had to
take pictures with a camera, since the caracters are so small. Reading
back those images, I will say this :
The pictures help. I see from the second picture that these are from a "rescue boot"; what happens with just a normal boot?
upon booting, a number of screen messages do appear and scroll down
fast. I could only see that 'OK' was on most or all of them. In the end,
a screen with smaller characters appear for 2-3 sec, that I have
photographied.It has two lines as follows :
/dev/sda1: clean, 408719/60530688 files, 116865639/242103552 blocks
[ 8.436046] nouveau 0000:01:00.0: priv: HUB0: 085014 ffffffff (1e70820b)
Those two lines only appear for 2-3 sec, so I had a hard time to
photography them on the screen, and I am just coping them by hand, Links
for photos are as follows :
http://bdebreil.free.fr/IMG_0900.jpg
http://bdebreil.free.fr/IMG_0901.jpg
http://bdebreil.free.fr/IMG_0902.jpg
http://bdebreil.free.fr/IMG_0903.jpg
http://bdebreil.free.fr/IMG_0904.jpg
After those 2-3 sec, another screen appears saying (translated from
French to English)
"Oops, something went wront. A problem has occured and the system cannot
recuperate. Please disconnect and try again"
Countless trials have all lead to the same behaviour.
Now, if I reboot on rescue mode, a lot of fast moving messages do
appear, I only could see that most or all of them bore the mention 'OK',
as said before. In the end, smaller characters do remain on screen,
waiting till I submit the root pasword. Then :
You are in rescue mode. After logging in, type "journalctl -xb" to view
system logs, "systemctlreboot" to reboot, "systemctldefault" or ?D to
boot into default mode
Give the superuser pswd (or press CTRL-D) to continue : [ 9.315865]
[TTM] Zone kernel: A
Available graphic memory: 2097152 kiB
[ 9.316077 [TTM] Initializing DMA pool allocator
[ nouveau ..... DRM:
......
etc ...
When typing 'ls -l' home directories do not appear (see pictures)
Try "ls -l /"
Next I typed 'journalctl -xb' to view system logs : a dozen of pages
which I will shoot later, one thing I have noticed in it all, printed in
red characters :
EXT4-fs (sda2): unable to read superblock
this repeated three times !
This looks a bit worrisome, but it may not actually be; it depends on what device is at sda2 (it might be a second (unformatted, unused) hard drive, or a USB thumb drive, or a CD/DVD drive, or ...). Without more context, it's hard to say much at this point. I'd hold off on worrying about it just yet. As mentioned above, I'm mostly interesting in knowing what happens when you do a normal boot.
Thanks in advance for your comments and advises.
Bernard