Re: New Grub2 verses Debian 9.5 -boots slow and strange?

[Pascal Hambourg]

Le 20/10/2018 à 13:27, address@hidden a écrit :
>    I wanted to try to answer your question about I meant by Debian 9.5 
> boot being flaky and slow.
>
>    Here is what happens now. I can't easily capture these screens.
>
>    Power up machine
>    Grub screen for a few seconds
>    Two lines looking for SD 4:0:0:0 [sdb]
>
> Seems normal except looking for 4:0:0:0 as SDB and not finding anything 
> so it gives up eventually?

"sd x:x:x:x" is a virtual SCSI device bus identifier thing. It is 
internal to the kernel. What are the exact lines ? You can find them in 
the output of "dmesg" after booting.

>    Gave up waiting for suspend/resume device

This is a swap device identifier issue. The swap used for hibernation 
can be defined in several locations. What is the output of the following 
commands ?

blkid -t TYPE=swap

grep -i resume /proc/cmdline /etc/default/grub
grep -i resume /etc/initramfs-tools/{initramfs.conf,conf.d/*}

> Boot process decides this is a very slow hard drive so decides to wait 
> for it to warm up?

No. Just waiting for non-existent devices and eventually giving up.

>    My guess at this point would be that when Debian was installed SDB 
> was at 4:0:0:0 and that grub or the early Debian boot process goes to 
> look for that physical device and does not find it?

It does not matter what the SCSI identifier was during the installation 
process. As I wrote, it is an internal kernel thing. It is not used to 
identify the root or swap device.