Bug#693756: follow-up: suspend working, wifi explanation

[chrysn <chrysn@fsfe.org>]

* suspend:

  suspend-to-ram never worked before on this system -- i forgot to
  mention that in the original report. a kernel upgrade to
  experimental's linux-image-3.7-trunk-amd64 3.7.1-1~experimental.2
  version made suspend-to-ram just work.

* wifi:

  i found out more about the original wifi problem as things broke
  after the 3.7 kernel update. the free kernel module brcmsmac works
  when loaded (this is what was used during installation), but has the
  signal strength issue described in the november 28th message. that
  problem persists up to kernel 3.7.

  the nonfree wl kernel module, which can be generated from
  broadcom-sta-dkms, was what made wifi work at full strength back then.
  however, that module crashes 3.7 until #698216 is fixed. the patch
  referenced there can easily be applied even now.

  to stay on the safe side, the free driver's bcma module probably needs
  blacklisting on this system as well (see #697496), but i've had enough
  reboots today to not test whether i really need that now.