Hi. I can't start xsession without iommu=remap=2 kernel parameter. Kernel bisect lead to commit e501b3d87f003dfad8fcbd0f55ae17ea52495a56 agp: Support 64-bit APBASE Reverting this fixes it for me. I think this is relevant part of dmesg from affected kernel agpgart-amd64 0000:00:04.0: AGP bridge [10b9/1689] agpgart-amd64 0000:00:04.0: aperture from AGP @ 0 size 4096 MB pci 0000:00:18.3: no usable aperture found pci 0000:00:18.3: consider rebooting with iommu=memaper=2 to get a good aperture agpgart-amd64 0000:00:04.0: AGP bridge [10b9/1689] agpgart-amd64 0000:00:04.0: aperture from AGP @ 0 size 4096 MB pci 0000:00:18.3: no usable aperture found pci 0000:00:18.3: consider rebooting with iommu=memaper=2 to get a good aperture agpgart-amd64 0000:04:00.0: AGP bridge [1002/4150] agpgart-amd64 0000:04:00.0: aperture size 4096 MB is not right, using settings from NB agpgart-amd64 0000:04:00.0: AGP aperture is 256M @ 0xa0000000 Please cc me if you need more information. I am not subscribed to list. -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
