I built K.org 2.6.29.2 and that works with DRM; this is probably significant in that it uses the write combining drm_core_ioremap_wc(), so it would appear that the Ubuntu patches for write combining are the culprit:
In summary: Ubuntu-pcc 2.6.28-6-powerpc [drm_core_ioremap_wc()] - fails Kernel.org 2.6.28.10 [drm_core_ioremap()] - works Ubuntu 2.6.28.9 (*2.6.28.11.15_all.deb) [drm_core_ioremap_wc()] - fails Ubuntu 2.6.28.9 hacked, remove _wc (*2.6.28.11.15_all.deb) [drm_core_ioremap()] - works Kernel.org 2.6.29.2 [drm_core_ioremap_wc()] - works -jh -- linux-image-2.6.28-5-powerpc has ioremap fault with radeon drm module https://bugs.launchpad.net/bugs/345542 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
