Bug#681254: xserver-xorg-video-radeon: HD 6450 video card not properly recognized / supported

[Gary Dale <garydale@rogers.com>]

On 12/07/12 04:01 AM, Michel Dänzer wrote:
> On Mit, 2012-07-11 at 13:59 -0400, Gary Dale wrote:
> > DRM Information from dmesg:
> > ---------------------------
> > [    0.000000] No AGP bridge found
> > [    0.000000] No AGP bridge found
> > [    2.160898] PCI-DMA: Disabling AGP.
> > [    2.160985] PCI-DMA: Reserving 64MB of IOMMU area in the AGP aperture
> > [    2.456450] Linux agpgart interface v0.103
> Looks like something is preventing the radeon kernel driver from
> loading / initializing. Make sure the radeon kernel module isn't
> blacklisted, e.g.
>
> The X radeon driver can't work without the corresponding kernel driver
> on your card, which probably also explains the resolution problem.
The radeon module can't be blacklisted. The onboard video (HD 3300) I 
have reverted to also uses it.

re. Kernel driver: Thanks. I didn't realize that it needed a kernel 
driver. I've followed instructions at 
http://www.x.org/wiki/radeonBuildHowTo#Kernel-based_ModeSetting and will 
give it another try.