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Old 07-11-2018, 03:18 AM   #1
JZL240I-U
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Controlling availability of FN1-FN6 consoles, error and status messages


This is on openSUSE.

I recently noticed that the <Ctrl><Alt> FN2-FN6 consoles are not anymore available after boot. Same for the error and status messages on <Ctrl><Alt> FN10 (besides the boot Messages on <Ctrl><Alt> FN1).

Does anybody know whether those are controlled by a config file or some such? An activation as early as possible during boot would be my preferred aim. And how could I activate the function keys "by hand" after booting?

Thanks for any answers, hints, suggestions ... .
 
Old 07-11-2018, 11:41 PM   #2
Keruskerfuerst
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What version are you using?
Opensuse Leap 15.0 or other?
 
Old 07-12-2018, 01:03 AM   #3
JZL240I-U
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Ups, sorry, tumbleweed.
 
Old 07-12-2018, 01:20 AM   #4
Keruskerfuerst
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I am using Leap 15.0 and this problem does not exist there.
 
Old 07-12-2018, 01:56 AM   #5
JZL240I-U
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Okay, but how is this feature controlled anyway? How to switch on/off the terminals or send messages to one of them?

Last edited by JZL240I-U; 07-12-2018 at 02:02 AM.
 
Old 07-12-2018, 03:20 AM   #6
ondoho
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i recently saw a thread here where it had sth to do with the proprietary nvidia driver...
 
Old 07-12-2018, 03:22 AM   #7
JZL240I-U
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I use AMD graphic cards and their open source driver(s)...
 
Old 07-12-2018, 12:09 PM   #8
Keruskerfuerst
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Can you test, which character is printed on console, when you hit CTRL+ALT+FN ?
 
Old 07-13-2018, 01:38 AM   #9
ondoho
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^ i think you meant CTRL+ALT+Fn, where n is a number between 1 and 12 (for a laptop user this might be confusing otherwise).
 
Old 07-13-2018, 02:06 AM   #10
JZL240I-U
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Quote:
Originally Posted by Keruskerfuerst View Post
Can you test, which character is printed on console, when you hit CTRL+ALT+FN ?
How would I do that? There are no symbols to read on the screen...

@ondoho Thanks, understood.
 
Old 07-13-2018, 02:56 AM   #11
ondoho
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^ so that means it doesn't output anything to console.
what _exactly_ is happening? does it simply stay on the tty running Xorg, or does the screen go black or something?
the latter would suggest a graphical issue. let's see:
https://www.startpage.com/do/dsearch...h+tty+consoles
the fedora ask looks relevant.

or maybe the key combo has really changed?
https://www.startpage.com/do/dsearch...ith+ctrl+alt+f
 
Old 07-14-2018, 11:41 AM   #12
JZL240I-U
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Well, I'll be ... something.

I used your links for inspiration and did from memory
Code:
me@PC:~> ps ax | grep tty
 1833 tty1     Ss+    0:00 /sbin/agetty -o -p -- \u --noclear tty1 linux
 1872 tty7     Ssl+   0:06 /usr/bin/X -nolisten tcp -auth /run/sddm/{c8be8a29-99d5-49f6-8156-1ac2f207579e} -background none -noreset -displayfd 17 -seat seat0 vt7
 4131 tty2     Ss+    0:00 /sbin/agetty -o -p -- \u --noclear tty2 linux
 5994 pts/0    S+     0:00 grep --color=auto tty
me@PC:~> sudo service tty3 restart
[sudo] Passwort für root: 
service: no such service tty3
As expected, tty1 + tty2 had a login prompt and tty7 the graphic-screen. The rest of the screens <CTRL><ALt><Fn> were simply empty and black with only the cursor blinking.

Then I dug some more in your links and after 5 minutes without any other commands in console I ran again:

Code:
me@PC:~> ps aux | grep tty
root      1833  0.0  0.0   4924   824 tty1     Ss+  18:15   0:00 /sbin/agetty -o -p -- \u --noclear tty1 linux
root      1872  7.8  0.9 961216 113068 tty7    Ssl+ 18:15   0:47 /usr/bin/X -nolisten tcp -auth /run/sddm/{c8be8a29-99d5-49f6-8156-1ac2f207579e} -background none -noreset -displayfd 17 -seat seat0 vt7
root      4131  0.0  0.0   4924   832 tty2     Ss+  18:16   0:00 /sbin/agetty -o -p -- \u --noclear tty2 linux
root      7938  0.0  0.0   4924   716 tty3     Ss+  18:17   0:00 /sbin/agetty -o -p -- \u --noclear tty3 linux
root      8105  0.0  0.0   4924   832 tty4     Ss+  18:17   0:00 /sbin/agetty -o -p -- \u --noclear tty4 linux
root      8181  0.0  0.0   4924   820 tty5     Ss+  18:17   0:00 /sbin/agetty -o -p -- \u --noclear tty5 linux
root      8358  0.0  0.0   4924   792 tty6     Ss+  18:17   0:00 /sbin/agetty -o -p -- \u --noclear tty6 linux
me 21308  0.0  0.0   8724   904 pts/0    S+   18:25   0:00 grep --color=auto tty
me@PC:~>
And they are really and truly there. Why? How?

Okay I ran an update yesterday, maybe that is it.

Still the one big question remains: how does this work? How can I do it if necessary all by myself (on console)? Is there a configuration available? Can this be enabled for emergency mode? Any ideas would be appreciated very much .

Last edited by JZL240I-U; 07-14-2018 at 11:42 AM.
 
  


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