Ah, now hal does show the quirks:

    power_management.quirk.radeon_off = true  (bool)
    power_management.quirk.s3_bios = true  (bool)
    power_management.quirk.s3_mode = true  (bool)

Does suspend work properly now with the backlight?

The other bug is of course the obsolete FDI cache. However, there are
several similar bug reports against hal already, so that is already
tracked.

As for the "base-line" test: you can do

  sudo dpkg -P --force-depends hal-info

then restart hal. After you are done, fix your system again with

  sudo apt-get install hal-info.

-- 
[Hardy] Thinkpad X31 (ATI Radeon M6) suspend backlight on
https://bugs.launchpad.net/bugs/199059
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