Sigh. I was forgetting about the linux-image-extra package. This proved to make a difference. Indeed, the post-Saucy versions that were succeeding were only doing so because the image-extra package was missing. Strangely, the USB dongle worked without that package but clearly there's an interaction with something else that needs a module from that package.
Armed with this new knowledge, I re-tested some of the builds I had tested previously (now with image-extra) and found this.
3.9.0-0 - good*
3.11.0-26 - bad
These are the first and last kernels of Saucy. The first one does not have an image-extra (the image package is larger). The last one does have an image-extra. I guess some time during Saucy, the packaging was changed?
My testing yesterday was booting with the USB dongle inserted (so that networking config could be applied during boot, similarly to how I intend to run the system). Today, I have been inserting the dongle after the system boots. I have attached netconsole5.log, which shows the kernel warning/error I got when I plugged the dongle in (on kernel 3.9.0-0). Note that despite this output, the system continued to run just fine.
Sigh. I was forgetting about the linux-image-extra package. This proved to make a difference. Indeed, the post-Saucy versions that were succeeding were only doing so because the image-extra package was missing. Strangely, the USB dongle worked without that package but clearly there's an interaction with something else that needs a module from that package.
Armed with this new knowledge, I re-tested some of the builds I had tested previously (now with image-extra) and found this.
3.9.0-0 - good*
3.11.0-26 - bad
These are the first and last kernels of Saucy. The first one does not have an image-extra (the image package is larger). The last one does have an image-extra. I guess some time during Saucy, the packaging was changed?
My testing yesterday was booting with the USB dongle inserted (so that networking config could be applied during boot, similarly to how I intend to run the system). Today, I have been inserting the dongle after the system boots. I have attached netconsole5.log, which shows the kernel warning/error I got when I plugged the dongle in (on kernel 3.9.0-0). Note that despite this output, the system continued to run just fine.