This bug is mainly about the problem when X doesn't start and /var/log/Xorg.0.log shows the following kind of lines:
(WW) ATI: PCI Mach64 in slot 8:0:0 could not be detected!
(WW) ATI: PCI Mach64 in slot 8:0:1 could not be detected!
(EE) No devices detected.
This bug is mainly about the problem when X doesn't start and /var/log/Xorg.0.log shows the following kind of lines:
(WW) ATI: PCI Mach64 in slot 8:0:0 could not be detected!
(WW) ATI: PCI Mach64 in slot 8:0:1 could not be detected!
(EE) No devices detected.
Ie. the upstream bug is about that.