<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW --- - failed to create kernel channel, -12 on G4 PPC" href="https://bugs.freedesktop.org/show_bug.cgi?id=58806#c2">Comment # 2</a> on <a class="bz_bug_link bz_status_NEW " title="NEW --- - failed to create kernel channel, -12 on G4 PPC" href="https://bugs.freedesktop.org/show_bug.cgi?id=58806">bug 58806</a> from <a class="email" href="mailto:marcin.slusarz@gmail.com" title="Marcin Slusarz <marcin.slusarz@gmail.com>"> Marcin Slusarz</a> <pre>What we found so far: Acceleration set up fails like that: Stacktrace: nouveau_drm_load nouveau_accel_init nouveau_channel_new nouveau_channel_ind nouveau_channel_prep nouveau_bo_map ttm_bo_kmap ttm_bo_ioremap ioremap_wc ioremap_wc returns NULL. bo->mem.bus.base and bo->mem.bus.offset are 0. Probably because of this code: <a href="http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blob;f=drivers/char/agp/uninorth-agp.c;h=a32c492baf5cc15001ad6882dc25a14d1be86419;hb=29594404d7fe73cd80eaa4ee8c43dcc53970c60e#l125">http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blob;f=drivers/char/agp/uninorth-agp.c;h=a32c492baf5cc15001ad6882dc25a14d1be86419;hb=29594404d7fe73cd80eaa4ee8c43dcc53970c60e#l125</a> and ioremap fails because of this: <a href="http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blob;f=arch/powerpc/mm/pgtable_32.c;h=6c856fb8c15b01705fb6cf5ff28c0a232d85d3bd;hb=29594404d7fe73cd80eaa4ee8c43dcc53970c60e#l204">http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blob;f=arch/powerpc/mm/pgtable_32.c;h=6c856fb8c15b01705fb6cf5ff28c0a232d85d3bd;hb=29594404d7fe73cd80eaa4ee8c43dcc53970c60e#l204</a> Booting with nouveau.agpmode=0 works.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>