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

From: Pascal Hambourg
Subject: Re: New Grub2 verses Debian 9.5 -boots slow and strange?
Date: Sat, 20 Oct 2018 14:33:22 +0200
User-agent: Mozilla/5.0 (X11; Linux i686; rv:52.0) Gecko/20100101 Thunderbird/52.9.1

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.

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