[systemd-devel] CAD often useless

[Felix Miata]

Lennart Poettering composed on 2015-04-16 12:32 (UTC+0200):

> Felix Miata wrote:

>> Needing again to CAD on yet another machine (kt88b this time, kt400 earlier),
>> again encountering / going into RO state, I noticed this time the message
>> "Ctrl-Alt-Del was pressed more than 7 times within 2s, rebooting
>> immediately". I remember having seen this on previous occasions to need CAD,
>> but it's still on the screen now, several minutes later, with the NUM key's
>> LED remaining responsive. IOW, it doesn't do either what it says, or what I
>> wanted. This is on F22 with PAE kernel 4.0.0-1 and PATA storage only except
>> for empty floppy drive.

> When you see this message, then systemd will not bother with shuttding
> down daemons cleanly anymore. However, it will still unmount all file
> systems and sync things do disk. It will also pass control back to the
> initrd,

So if initrd is deleted or rebuilt for the running kernel, shut down normally
is not possible?

> which might disassemble LVM if that is used.

NA here.

> If things hang in that logic then this is either an issue with
> LVM/initrd, or with your driver/hw when we try to sync the disks.

Definitely the disks in the two systems that triggered the thread...

> Given that your fs was remounted read-only (which the kernel does
> automatically if it notices something seriously wrong with the disk),
> my guess is that the disk syncing trips you up.

In the latter of the two, I found the cheapie PS has flimsy connectors after
subsequent POST couldn't find the disk. I pinched them all closed on and
reconnected the one for the HD, and its trouble stopped. In the former, there
was some problem with cabling as well, but I already forgot what. :-p
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/