Comment # 33 on bug 898395 from Oliver Neukum

(In reply to Bit Juggler from comment #32)

> user@MACHINE:~/kernel-source> git bisect good v3.9
> fatal: Needed a single revision
> Ung�ltige Referenz-Eingabe: v3.9
> user@MACHINE:~/kernel-source>

Was does "git tag" give you?