Hi akhzier,
Thanks for the reply. At last I have my KDE login again. 
The problem was:
1. Now I boot when when udev starts and populates /dev node, the /dev/null 
cannot get the permission that requires, i.e. 666, no idea suddenlz why it 
happens !!!!!
2. suddenly /usr/X11/bin/Xorg losts its sticky bit. I reverted the change. 

Now in my ~/bashrc  file I needed to add :
sudo chmod 666 /dev/null. 

As per the HP printer problem is concerned, I have tried almost every 
combination, but somehow it didn't work. 
SO I would like start from the beginning unstalling everything. 
Can you please tell me the order in which I will install the required module 
and and configure everything.
Thanks,
Roy
    


 
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________________________________
 From: akhiezer <lf...@cruziero.com>
To: BLFS Support List <blfs-support@linuxfromscratch.org> 
Sent: Saturday, September 21, 2013 12:08 PM
Subject: Re: [blfs-support] Kde cannot start !!!!!
 

> Date: Sat, 21 Sep 2013 10:48:21 +0100
> From: akhiezer
> To: BLFS Support List <blfs-support@linuxfromscratch.org>
> Subject: Re: [blfs-support] Kde cannot start !!!!!
>
> > Date: Sat, 21 Sep 2013 02:06:13 -0700 (PDT)
> > From: Sirsendu Roy <xai...@yahoo.com>
> > To: "blfs-support@linuxfromscratch.org" <blfs-support@linuxfromscratch.org>
> > Subject: [blfs-support] Kde cannot start !!!!!
> >
> > Hi All,
> > Yesterday when I try to start the BLFS and tried to log into KDE, I got 
> > this message :
> >
> > Call to lnusertemp failed (temporary directories full?) check your 
> > installation.
> >
> > I didn't change anything. In my disk I have 10 GB free space. 
> >
> > Please help. 
> >
>
>
> Like for the cups-printing issue, may be lack of partition-space, and so can 
> you 
> post the output of (which you repeatedly didn't do for the cups-printing sos):
>
> $ df -hP
>
> Also:
>
> $ \ls -dl /tmp
>
>
> rgds,
> akh
>


- you want /tmp to be:
  drwxrwxrwt 80 root root [...] /tmp
If necessary, do:
  chmod 1777 /tmp    # NB the '1'  .

- a quick follow-up googling indicates folks think they solved it by one or 
more 
of:
----
* /dev/null &/or /etc/passwd somehow ended up with wrong permissions. Should be:
  crw-rw-rw- 1 root root 1, 3 [...] /dev/null
  -rw-r--r-- 1 root root [...] /etc/passwd

* homedir .kde4 dir somehow ended up with wrong permissions or otherwise messed 
up.
  Crude solution:
    mv -i ~/.kde4 ~/.kde4.BKUP-00
    Then start kde.
  Less-crude:
    cp -iax ~/.kde4 ~/.kde4.BKUP-01 ; chown -R your_username: ~/.kde4  # NB the 
':'  
    Then start kde.

* folks getting program installations messed-up, etc, etc. Try the above stuff 
first.
----


hth,

akh





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