Hello, Gautam
What no /var/run/dmesg.boot and /var/log/Xorg.0.log:')
> I've checked that all drivers are up to date \
> (have radeondrm-firmware-2013-1002p0.tgz)
This is some what unclear.
Lets start by making sure all firmware has been unpacked correctly.
> I've been able to get to the console login the machine by entering \
> "boot -c", "disable radeondrm", and then "quit" at the boot prompt.
^ ^ ^ ^
^ ^ ^
Boot the machine as above.
Make sure you have a properly configured connection to the internet.
Log in as root, (or a sudo(8) enabled user).
Run,
/usr/sbin/fw_update -a
Have you added a /etc/X11/xorg.conf?
Disable it.
/bin/mv /etc/X11/xorg.conf /etc/X11/xorg.conf.DISABLED
Remove any previous /var/log/Xorg.0.log and /var/log/Xorg.0.log.old.
/bin/rm /var/log/Xorg.0.log*
Reboot the machine.
/sbin/reboot
Do not "boot -c", "disable radeondrm"....
If this fixes the radeon issue great.
Problem solved.
If not.
Post your /var/run/dmesg.boot and /var/log/Xorg.0.log.
Make sure you post the right Xorg.0.log.
If you reboot using the integrated Intel HD Graphics 4400, this will
move the previous Xorg.0.log with the radeon probe to Xorg.0.log.old.
> GPU is an AMD FirePro v4900, featuring a 6670 "Turks" processor.
I see your hardware is in the man(1) page ( /usr/bin/man radeon ).
Although I do not see Xorg probing for AMD FirePro v4900, 6670.
Regards,
Gerald Hanuer