Hi,
Current nouveau code in Linus' tree oopses with noaccel. Didn't happen in 3.6. Full dmesg attached.
Ortwin
BUG: unable to handle kernel NULL pointer dereference at 0000000000000018 Oct 10 18:05:49 localhost kernel: IP: [<ffffffff8144082e>] nouveau_channel_new+0x41e/0x670 Oct 10 18:05:49 localhost kernel: PGD 22ddd7067 PUD 22f76f067 PMD 0 Oct 10 18:05:49 localhost kernel: Oops: 0000 [#1] PREEMPT SMP Oct 10 18:05:49 localhost kernel: Modules linked in: Oct 10 18:05:49 localhost kernel: CPU 0 Oct 10 18:05:49 localhost kernel: Pid: 2723, comm: X Not tainted 3.7.0-pre #1 Hewlett-Packard HP EliteBook 8540w/1521 Oct 10 18:05:49 localhost kernel: RIP: 0010:[<ffffffff8144082e>] [<ffffffff8144082e>] nouveau_channel_new+0x41e/0x670 Oct 10 18:05:49 localhost kernel: RSP: 0018:ffff88023026bc68 EFLAGS: 00010202 Oct 10 18:05:49 localhost kernel: RAX: 0000000000000000 RBX: ffff88022ceeca80 RCX: 0000000000000088 Oct 10 18:05:49 localhost kernel: RDX: ffffc900127e408c RSI: ffffc900127e408c RDI: ffff88022ceeca80 Oct 10 18:05:49 localhost kernel: RBP: ffff88023026bce8 R08: 000000000000ffff R09: 0000000000000000 Oct 10 18:05:49 localhost kernel: R10: 0000000000000010 R11: 000000000000000f R12: 0000000000000000 Oct 10 18:05:49 localhost kernel: R13: ffff880231f36800 R14: ffff88022f68ca00 R15: ffff88022f68ca00 Oct 10 18:05:49 localhost kernel: FS: 00007f129a597880(0000) GS:ffff88023bc00000(0000) knlGS:0000000000000000 Oct 10 18:05:49 localhost kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Oct 10 18:05:49 localhost kernel: CR2: 0000000000000018 CR3: 00000002300a1000 CR4: 00000000000007f0 Oct 10 18:05:49 localhost kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Oct 10 18:05:49 localhost kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Oct 10 18:05:49 localhost kernel: Process X (pid: 2723, threadinfo ffff88023026a000, task ffff880231edbde0) Oct 10 18:05:49 localhost kernel: Stack: Oct 10 18:05:49 localhost kernel: ffff88023026bcb0 ffff88022f68ca00 ffff88022f68caa8 ffff8802311be9c0 Oct 10 18:05:49 localhost kernel: d8000001d8000002 ffff88023026bc98 0000200000000000 0000000000000000 Oct 10 18:05:49 localhost kernel: 000000ffffffffff ffff880231f9afa0 ffffffffffffffff ffff8802323c0840 Oct 10 18:05:49 localhost kernel: Call Trace: Oct 10 18:05:49 localhost kernel: [<ffffffff81448cbc>] nouveau_abi16_ioctl_channel_alloc+0x15c/0x360 Oct 10 18:05:49 localhost kernel: [<ffffffff813a9120>] drm_ioctl+0x2a0/0x4f0 Oct 10 18:05:49 localhost kernel: [<ffffffff81448b60>] ? nouveau_abi16_ioctl_setparam+0x10/0x10 Oct 10 18:05:49 localhost kernel: [<ffffffff81076be4>] ? __do_page_fault+0x1c4/0x490 Oct 10 18:05:49 localhost kernel: [<ffffffff81198eb7>] do_vfs_ioctl+0x97/0x4f0 Oct 10 18:05:49 localhost kernel: [<ffffffff81199367>] sys_ioctl+0x57/0x90 Oct 10 18:05:49 localhost kernel: [<ffffffff818635a2>] system_call_fastpath+0x16/0x1b Oct 10 18:05:49 localhost kernel: Code: e2 02 48 89 df e8 d3 02 00 00 8b 83 80 00 00 00 89 83 84 00 00 00 0f 1f 80 00 00 00 00 48 8b 43 08 48 89 df 48 8b 80 f8 06 00 00 <ff> 50 18 41 89 c4 85 c0 0f 84 65 fd ff ff 0f 1f 40 00 4c 89 ff Oct 10 18:05:49 localhost kernel: RIP [<ffffffff8144082e>] nouveau_channel_new+0x41e/0x670 Oct 10 18:05:49 localhost kernel: RSP <ffff88023026bc68> Oct 10 18:05:49 localhost kernel: CR2: 0000000000000018 Oct 10 18:05:49 localhost kernel: ---[ end trace e23ae1067c361c88 ]---