Hi Tech-Kern,
Sadly, the radeon DRM2 driver must be disabled with userconf in order to
successfully boot a mid 2010 21.5" iMac (Radeon HD 4670 256MB/RV730) --
otherwise the screen goes black when the kernel is switching to userland/init.
I'm using 10_RC1 and also had this problem in the beta and also in 9, I think.
I hacked kern/init_main.c to panic on line 739 before the display goes dark and
the last two dmesgs are:
pci_mem_find: void region (dev/pci/pci_map.c)
radeon0: map 5 failed (could not find corresponding source file)
Oddly, ddb isn't invoked, despite ddb.onpanic=1, so I can't generate a kernel
memory dump.
I tried getting more debug output by using various config options, including
the following without much luck: DIAGNOSTIC, DEBUG, DRM_DEBUG, DRM2_DEBUG,
RADEON_DEBUG
I even tried to comment out radeon and uncomment radeondrm in the config, but
get a lot of errors at link time complaining about undefined references in the
radeondrm code.
Before I start hacking at pci_map.c, I wanted to check if anyone has any
insights or experience or suggestions in this area.
Thanks in advance for your help. Really want that hardware acceleration --
surprise, surprise! ;-)
_____
| * * | Josh Moyer (he/him) <jmo...@nodomain.net>
|*(*)*| http://jmoyer.nodomain.net/
\ - / http://www.nodomain.net/
\//
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Please don't eat the animals.
Thanks.
