That's right -- nouveau currently requires 4k page sizes to work. This is a software limitation, not a hardware one though. <div class="gmail_extra"> <div class="gmail_quote">On Dec 1, 2016 5:13 PM, "Jeremy Linton" <<a href="mailto:jeremy.linton@arm.com">jeremy.linton@arm.com</a>> wrote: <blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi, I placed a 9600GT in a softiron 3k running fedora 25, and the nouveau driver failed to claim the device with : [drm] Initialized nouveau 0000:01:00.0: NVIDIA G94 (094100a1) nouveau 0000:01:00.0: bios: version 62.94.0d.00.04 nouveau: probe of 0000:01:00.0 failed with error -22 Which with a little bit of debugging seems to be a failure in: [77216.692605] [<ffff000001404120>] ttm_bo_validate+0xb0/0x1e8 [ttm] [77216.698697] [<ffff0000014045ac>] ttm_bo_init+0x354/0x410 [ttm] [77216.704706] [<ffff0000019d7bd0>] nouveau_bo_new+0x1f4/0x314 [nouveau] [77216.711308] [<ffff0000019e4620>] nv50_display_create+0x10c/0xa1c [nouveau] [77216.718340] [<ffff0000019df898>] nouveau_display_create+0x50c/0x59c [nouveau] [77216.725632] [<ffff0000019d3e24>] nouveau_drm_load+0x22c/0x8c0 [nouveau] [77216.732286] [<ffff00000137a1a0>] drm_dev_register+0xc0/0xf0 [drm] [77216.738409] [<ffff00000137b8a4>] drm_get_pci_dev+0xbc/0x188 [drm] [77216.744663] [<ffff0000019d35e8>] nouveau_drm_probe+0x180/0x208 [nouveau] [77216.751354] [<ffff0000084c30dc>] local_pci_probe+0x50/0xb4 [77216.756827] [<ffff0000084c3e40>] pci_device_probe+0xf8/0x148 [77216.762474] [<ffff0000085b6a10>] driver_probe_device+0x284/0x420 [77216.768467] [<ffff0000085b6ccc>] __driver_attach+0x120/0x124 [77216.774115] [<ffff0000085b446c>] bus_for_each_dev+0x6c/0xac [77216.779673] [<ffff0000085b6204>] driver_attach+0x2c/0x34 [77216.784972] [<ffff0000085b5cb4>] bus_add_driver+0x244/0x2b0 [77216.790531] [<ffff0000085b78e4>] driver_register+0x68/0xfc [77216.796004] [<ffff0000084c29a8>] __pci_register_driver+0x60/0x6c [77216.802047] [<ffff00000137bcb8>] drm_pci_init+0x108/0x138 [drm] [77216.808146] [<ffff000001530158>] nouveau_drm_init+0x158/0x10000 [nouveau] [77216.814922] [<ffff0000080831a8>] do_one_initcall+0x44/0x128 [77216.820483] [<ffff0000081cad6c>] do_init_module+0x68/0x1e0 [77216.825957] [<ffff000008150d84>] load_module+0xfac/0x12bc [77216.831343] [<ffff00000815132c>] SyS_finit_module+0xe4/0xf0 [77216.836902] [<ffff000008082b70>] el0_svc_naked+0x24/0x28 By default fedora is using a 64k page kernel, switching to a mainline 4.9-rc7 kernel using the same configuration the same problem exists (there are a couple others, mentioned briefly in the defect). Changing the mainline kernel from 64k to 4k pages corrects the problem and a terminal display can be seen. The fedora defect is: <a href="https://bugzilla.redhat.com/show_bug.cgi?id=1400623" rel="noreferrer" target="_blank">https://bugzilla.redhat.com/show_bug.cgi?id=1400623</a> Thanks, _______________________________________________ dri-devel mailing list <a href="mailto:dri-devel@lists.freedesktop.org" target="_blank">dri-devel@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/dri-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/dri-devel</a> </blockquote></div> </div>