Comment # 8 on bug 943179 from Takashi Iwai

(In reply to Takashi Iwai from comment #7)
> I dug an old HP laptop with the same CPU (Turion X2) and tested 32bit
> installation.  And, the problem was confirmed indeed.  It hangs up at boot.
> 
> However, now even the old kernel (openSUSE-13.2 GA kernel) fails to boot,
> too.
> At the fresh installation state, there was no ucode-amd installed.  Thus it
> booted without ucode.  So, the (latest) ucode-amd fails with both 3.16.6 and
> 3.16.7-24 kernels.
> 
> I'm going to try other 3.16.x kernels, just to be sure...

3.16.7-21 boots up.  So indeed it's a regression from 3.16.7-21 to 3.16.6-24.