[SOLVED] Sources error on both LXDE 32bit and 64bit.

[Dan]

Has anyone else been receiving the following error message...

W: GPG error: http://extras.ubuntu.com trusty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 16126D3A3E5C1192

I've looked through my sources.list, but can't find a source by that exact name. The closest I have is...

## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu trusty main
deb-src http://extras.ubuntu.com/ubuntu trusty main

I'm going to comment that source out and see what effect it has.

[Dan]

Okay, I commented that source out and ran sudo apt-get update...and the source in question appeared in the terminal during the update...

Hit http://us.archive.ubuntu.com trusty Release.gpg                     
Hit http://us.archive.ubuntu.com trusty Release

I went back and enabled the source that I commented out...wonder why I can't find that trusty Release source?

[Dan]

From what I've read, this is a common Ubuntu error.

It comes from having too many extra sources from what I understand. That's just it though, I don't have a lot of extra sources. I only have 2 or 3 extra above what came stock.

Anyway, I think the offending source was related to the recent fix I installed for fonts in WINE. That was the only source in the trusted.gpd.d folder ...

Anyway, I've tried some of the fixes that I've found online...to no avail. I keep my system pretty bare, so I think I'll just reinstall. Getting that error will drive me crazy. 

[Dan]

I've reinstalled, and have installed all updates. The error hasn't reappeared.

Whether the error was truly related to the PPA that I installed for the improved font rendering on WINE...I don't know. However, after seeing the difference it made in the fonts, I searched around until I found a .deb package for it instead of using the PPA. I've installed the .deb package, and I'm getting the same results with the font rendering. 

Neither am I getting the sources error with the .deb package as I was with the PPA either. I will make links to the .deb package in the thread for improving font rendering on WINE.

Again, I don't know for sure if that PPA was the culprit, but I am highly suspicious.

[Dan]

AH HA! Found the culprit(s)...

I'll spare the details, but after comparing my reinstalled 32bit with the 64bit (which I had not yet reinstalled), I could find only one difference...

I looked at the Software and Updates application, and under the Other Software tab on the 64bit, there were check marks next to both Independent sources. They weren't checked on the reinstalled 32bit.

How they got check marks, I don't know...

I removed the check marks, ran an update, and no error message any longer. 

I don't know if this is the proper, perfect, or textbook fix...but it worked. 

[Dan]

How they got check marks, I don't know...

After more investigation, I figured out how the check marks got placed on those Independent sources. The tool that I used to make backup ISOs of my systems placed them there.