Restoring FC6 to original settings...

[Sam Varshavchik]

Alex Miua writes:

> Hi!
> 
> Thank you for your reply. The reason I want to do this
> is that after installing some updates FC says that it
> can't detect the soundcard anymore.( The soundcard was
> working fine initially ) .
> 
> 
> Is this a good idea? 

No.  It's like using a hammer to swat a fly.  This is not some other 
operating system, where once you screw it up, you're boned.  You do not need 
to nuke everything and start over, because of one broken update.  Every 
update is reversible, and can be backed out, presuming that your filesystem 
is not completely hosed.

First of all, you need to identify which specific update screwed you up.

Then, it's a simple matter to back out that update (or a group of updates), 
reverting to the previous versions of the guilty package.

In your case, the most likely suspect is the 2.6.19 kernel update for FC6. 
If that's the update that screwed you up, the first thing to do is to file 
your particular details in bugzilla, recording your hardware details. This 
will keep the right parties aware of issue.  File a bug against the kernel 
package, and attach the output of "lspci -vv", "lspci -n", and "dmesg" 
commands.

The next step is to go revert to the original 2.6.18 kernel.  You should 
still have it installed, the update should not have removed it, only your 
default boot kernel is was set to 2.6.19.  When you boot the machine, press 
Enter at the initial grub prompt, instead of waiting the requisite 5 
seconds to count down.  Scroll down and select the original 2.6.18 kernel, 
then press enter to boot it.

If that fixes your sound card problem, then it's a simple matter of changing 
your default boot kernel.  You'll need to edit the file /boot/grub/menu.lst, 
and change the "default=X" setting.  X is the number of the default kernel, 
with the first kernel listed in menu.lst being kernel #0.  The original 
2.6.18 kernel is _probably_ the second kernel listed in menu.lst, which 
would make it kernel #1; so changing "default=0" to "default=1" in menu.lst 
will reset the default boot kernel to 2.6.18.  When editing menu.lst be 
careful to avoid any typos, which will have catastrophic effects.

But if the update that screwed you up was not the kernel update, then you'll 
need to do some detective work on your part and identify which update it 
was.  Then, we can tell you how to back it out.


> 
> Thank you,
> Alex
> .--- Sam Varshavchik <mrsam at courier-mta.com> wrote:
> 
>> Alex Miua writes:
>> 
>> > Hello everyone!
>> > 
>> > If I want to "re install " FC6 with the orginal
>> CD's
>> > and restore the original settings of it, is there
>> a
>> > way of doing it ? 
>> 
>> Define "original settings".
>> 
>> There are no all-encompassing, over-arching
>> configuration settings in 
>> Fedora, like the Windows registry.  Each program
>> handles its own 
>> configuration settings in its own way.
>> 
>> If you want to reinstall everything from scratch,
>> just run the installer and 
>> tell it to wipe all your existing partitions. 
>> Everything will get 
>> reformatted and repartitioned, from scratch.
>> 
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> 
> 
>  
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