https://wiki.archlinux.org/index.php/AT … logging_in
I also got this to work in debian/ubuntu based distros installing "fglrx-driver" which makes 0 sense because fglrx doesn't support R600 cards.
]]>https://bbs.archlinux.org/viewtopic.php?id=99742
I followed the one fix that was posted.
I added radeon.new_pll=0 to my kernel boot line in grub.cfg and added
options radeon new_pll=0
in /etc/modprobe.d/radeon.conf
However when I boot I get an error which says radeon: Unknown parameter 'new_pll=0' and then X wont start, any idea why this might be happening? i've been trying to solve this problem for quite some time.
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