[Discuss-gnuradio] gr-osmosdr issues ?

[jmfriedt]

My apologies for such a trivial bug report, but has anyone experienced issues 
with gr-osmosdr
"lately" (not sure when the problem started) about "PLL not locked" and data 
flow rate mismatch
in gnuradio data flows ?

I have a couple dozen RTL2832U based dongles used for various SDR activities 
which have been
working quite flawlessly until this summer at least. Being currently in the 
process of preparing
the new teaching semester, I just discovered that *all* dongles (E4k, R820T or 
R820T2) experience
the same lack of PLL locking and data flow rate mismatch when connected to USB 
ports *on laptops* 
(tested on four different laptop models, yet all running Debian/GNU Linux 
distributions, testing
and sid releases). The audio output in such a simple decoding stream as Osmosdr 
Source - Low pass
filter - WBFM decoder - audio output is not continuous and of very bad quality. 
The *same* dongles 
connected to desktop setups with the same Debian/GNU Linux distribution exhibit 
no issue: stream 
rate is consistent and sound quality excellent. Of course searching on the web 
for "PLL not locked"
yields a couple of million hits explaining that the tuned frequency range is 
not within the
bandwidth of the dongle VCO, which is not the case here.

Has anyone seen reports of this issue before ?

Thanks, JM

-- 
JM Friedt, FEMTO-ST Time & Frequency/SENSeOR, 26 rue de l'Epitaphe, 25000 
Besancon, France