Nicolas Dobigeon composed on 2014-10-23 00:27 (UTC+0200):

>> Tini composed on 2014-10-22 18:48 (UTC-0300):

>>  If I used Sony/Verbatim/Maxell discs, then > everything worked okay.

>> Those discs are cheap for a (bad) reason!

> I agree with this fact, i never had any problem with k3b but many with cheap discs.
> I try to buy the most of time Verbatim discs.

I burned many hundreds of DVD-Rs, maybe over a thousand, including a high
percentage of coasters, before I learned how to deal with media quality.
http://www.digitalfaq.com/reviews/dvd-media.htm is what brought me up to
speed. It may not be up to date now, but it taught me to stop buying less
than top quality media. Since then, I've only bought from one (online)
source, and only one brand: Taiyo Yuden.

If you read my OP, you should have noticed I included the media code and
brand: (CMC MAG, AM3) Verbatim. According to that page, the media I've used
WRT this thread are in the "non-Archival" category, less than best). IOW,
though Verbatim, not great quality. I didn't buy them, but I do know they
were purchased several years ago, when that page was probably close to up to
date. They were provided to me by a friend in order to copy for her DVDs I
had burned with a DVDR.

OTOH, among the pre-enlightenment discs I burned, the only ones I've later
discovered to have become useless are Maxells.

My OP was an attempt to discover whether I was having media or software
issues. Based on observations and thread posts since, software has proven to
be sole fault, and cosmetic only. All discs play. K3b's UI when selecting
on-the-fly is what is failing.

When I run out of her blanks, I may try on-the-fly one more time with one of
my better blank media, but I don't expect any better behavior from K3b with it.
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/