Same issue happend on system with BCM4313 [14e4:4727], also sighted in 13.04( bug 1097519 ) and 12.04.1( bug 1220504 ).
Same issue happend on system with BCM4313 [14e4:4727], also sighted in 13.04( bug 1097519 ) and 12.04.1( bug 1220504 ).