From: anssi.saari@usenet.mail.kapsi.fi   
      
   Markus Robert Kessler  writes:   
      
   > On Mon, 13 Nov 2023 07:21:37 -0500 Paul wrote:   
   >   
   >> On 11/13/2023 5:21 AM, Markus Robert Kessler wrote:   
   >>> Hello everyone,   
   >>>   
   >>> after installing I was wondering how this can be that an OS boots   
   >>> within some seconds?   
   >>>   
   >>> From other distros I am used that boot needs around 20-40 seconds, but   
   >>> Ubuntu 23.10, after passing the (legacy) BIOS, is prompting its   
   >>> graphics surface after around 4-5 seconds.   
   >>> This looks to me that they created some kind of image which is unpacked   
   >>> and started when booting. It's just, that I do not remember that such   
   >>> options were shown during installation.   
   >>>   
   >>> Besides this, any change to files in the /etc/profile.d directory do   
   >>> not take effect directly after modifying. Maybe, instead, remaking the   
   >>> image afterwards is just triggered to make the changes permanent.   
   >>>   
   >>> It seems that these two things are somehow related.   
   >>>   
   >>> Does anyone know exactly what's behind that warpspeed boot?   
   >>>   
   >>> Thanks!   
   >>>   
   >>> best regards,   
   >>>   
   >>> Markus   
   >>>   
   >>>   
   >> S3 Sleep or S4 hibernate ?   
   >>   
   >> Hardware is a laptop or tablet ?   
   >>   
   >>    Paul   
   >   
   > Hi Paul, Marco,   
   >   
   > it's normal boot, no sleep-mode or hibernate. Machine is a laptop /   
   > notebook with docking station.   
   >   
   > I just went into grub menu, now, selected "advanced options for Ubuntu"   
   > ==> "Ubuntu with Linux 6.5.0-10-generic". ==> It prompts   
   >   
   > "Loading Linux 6.5.0-10-generic ...   
   > Loading initial ramdisk ..."   
   >   
   > After that, it says that /dev/sda1 is clean,   
   > and a few seconds later, graphics mode is active.   
   > No systemd messages like "xxx target reached", "waiting for service yyy"   
   > and so on are displayed as known from other distros.   
   > Same behaviour when just booting without touching anything but even   
   > faster.   
      
   One thing that speeded up the boot on my desktop system was preciselya   
      
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