Comment 6 for bug 1459110

Same here.
I suspected it had something to do with proxies. But the proxy settings are the same as in 14.10 and I upgraded to 15.04.
kdesudo muon-discover paints the window, while (sudo) muon-discover gets stuck at building the window.

I don't know if this is related, but I also get stuck at '0% [waiting for headers] ' when installing wine from the wine ppa.