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List:       fedora-list
Subject:    trip report: upgrading to Fedora 36 (fwd)
From:       "D. Hugh Redelmeier" <hugh () mimosa ! com>
Date:       2022-06-01 14:44:34
Message-ID: fb9bffa4-19d-da4e-601c-5f4ec402ab6 () mimosa ! com
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[I wrote this for the Greater Toronto Area Linux Users Group but it might 
be of interest to this list.]

I just upgraded several systems to from Fedora 34 or 35 to Fedora 36 over 
the last week. This process is mostly uneventful.  Here are some notes.

There are two ways to upgrade:

- use the GNOME "software" GUI and tell it to just do it.

- use the "dnf" technique
  <https://docs.fedoraproject.org/en-US/quick-docs/dnf-system-upgrade/>

I like the dnf technique because I can see what's going on (and perhaps 
see what is going wrong, if anything).  Superstition.  The "software" 
program has worked fine when I've used it.

Another superstition: after step 1 in the dnf technique, I like to do
	sudo dnf autoremove
This removes leaf packages that were installed due to dependencies but are 
no longer used.  Theory: those orphans may have no upgrade path; it is 
better to ditch them that to try to upgrade them.


I did run into three problems:

- one system's grub could not see any new kernels so I could only boot 
  with the last f35 kernel.  I fixed this by doing a clean re-install.

  Here's what I think went wrong (only a theory):

  + the latest kernel and a rescue kernel + initrd are installed in the 
    ESP (/boot/efi).  This is new.  I didn't see it documented.

  + this requires more free space in the ESP than my system had

  + kernel installation silently failed!  Even when I tried to fix
    things by installing kernels after the upgrade

  It looks like some others have hit this:
	
<https://ask.fedoraproject.org/t/f36-kernel-wont-install-due-to-running-out-of-space-in-boot-efi/22498/10>
 <https://bugzilla.redhat.com/show_bug.cgi?id=2071034>

  Make sure that you have enough free space in /boot/efi.  300MiB should 
  be plenty -- those files currently take 130MiB on my system.


- On some systems, I use kernel driver modules from RPMFusion.  In 
  particular, the NVidia proprietary driver and the broadcom-wl driver.
  After update, they didn't work.  The fix:
	sudo depmod
  It is listed as the first Common Bug on rpmfusion.org
	<https://rpmfusion.org/CommonBugs#System-upgrade%20and%20kmod(-nvidia)%20issue>


- after the upgrade, some WiFi passwords were forgotten and needed to be 
  re-entered.  If you upgraded using WiFi, that connection's password was 
  retained.  I didn't do careful observations so I may be wrong.
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