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Re: Downgrading to FC4



On Thu, 23 Jun 2005, Thomas Zehetbauer wrote:

On Thu, 2005-06-23 at 00:12 -0700, Panu Matilainen wrote:
The fact that you can, sort of, downgrade doesn't make it a good idea.
Rpm's don't support downgrade reliably, while it works most of the time ok
it might just as well not work leaving you with strange problems and
quirks.

And the fact that RPMs support upgrades doesn't mean that they always work without strange problems. For example: - openssl-0.9.7f-4 caused my postfix to break because the CA was moved to /etc/pki/tls/certs/ca-bundle.crt - pam-0.79-8 made me unable to login because of "set_loginuid failed opening loginuid" ...

Still we all do upgrades, don't we?

Bugs happen. For upgrades people at least *try* to make things work, but nobody even looks at getting downgrading right. There's a big difference there...


PS: It would be a very nice feature if yum/rpm could generate a
differential changelog when doing an upgrade. E.g. generate a file and
write the name of each package being updated followed by the changelog
entries between the old and new version.

There's a plugin in yum-utils cvs which can do something like that, see below. Having it log them to a file or whatever would be quite trivial. OTOH you need yum 2.3.3 or newer for the plugin to work.


[root localhost pmatilai]# yum --changelog update
Loading "changelog" plugin
Setting up Update Process
Setting up repositories
[....]
Is this ok [y/N]: y
Downloading Packages:
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
  Updating  : hwdata                       ######################### [1/2]
  Cleanup   : hwdata                       ######################### [2/2]

Changes in updated packages:
hwdata - 0.158.1-1.noarch
* Thu Jun 23 01:00:00 2005 Bill Nottingham <notting redhat com> - 0.158.1-1
- add JVC CD-ROM (#160907, <richard rsk demon co uk>)
- add hisax stuff to blacklist (#154799, #159068)


* Tue May 17 01:00:00 2005 Bill Nottingham <notting redhat com> - 0.158-1
- add a orinoco card (#157482)

* Fri May  6 01:00:00 2005 Jeremy Katz <katzj redhat com> - 0.157-1
- add 20" Apple Cinema Display

* Mon Apr 11 01:00:00 2005 Mike A. Harris <mharris redhat com> 0.156-1
- Update SiS entries in Cards/pcitable to match what Xorg X11 6.8.2 supports


* Thu Mar 31 01:00:00 2005 Dan Williams <dcbw redhat com> 0.155-1
- Add a boatload of BenQ, Acer, Sony, NEC, Mitsubishi, and Dell monitors


Updated: hwdata.noarch 0:0.158.1-1 Complete!


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