==System Environment== -------------------------- Regression: Yes. Good commit on -next-queued: 4ed91096881449012b14b1e879f40b4a37533e0e Non-working platforms: BSW ==kernel== -------------------------- origin/drm-intel-nightly: 186631131a9289dad22f51315d78b9b6ac5b425f(fails) drm-intel-nightly: 2014y-08m-15d-14h-55m-27s integration manifest origin/drm-intel-next-queued: ecca3fd0ea82c45b558f68b1ff3bf6685b443ab1(fails) drm/i915/bdw: Enable Logical Ring Contexts (hence, Execlists) origin/drm-intel-fixes: 103ae732ad26141515f109c80b5c1ced16e457c3(System is able to boot up, can log in by ssh, and testdisplay is able to detected monitors like eDP and HDMI, but the monitors unable to light up) drm/i915: Don't try to enable cursor from setplane when crtc is disabled ==Bug detailed description== ----------------------------- System unable to boot up Reproduce steps: ------------------------- 1. Boot the device.
ecca3fd0ea82c45b558f68b1ff3bf6685b443ab1 is the first bad commit commit ecca3fd0ea82c45b558f68b1ff3bf6685b443ab1 Author: Oscar Mateo <oscar.mateo@intel.com> AuthorDate: Thu Jul 24 17:04:49 2014 +0100 Commit: Daniel Vetter <daniel.vetter@ffwll.ch> CommitDate: Fri Aug 15 14:48:25 2014 +0200 drm/i915/bdw: Enable Logical Ring Contexts (hence, Execlists) The time has come, the Walrus said, to talk of many things. Signed-off-by: Oscar Mateo <oscar.mateo@intel.com> Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> :040000 040000 c7e0f1164921eff4b758dddd07240cfe3de7e1e8 744b0adac0c50596a7a2d28eb5c921f6522ba3e5 M drivers
Please try http://patchwork.freedesktop.org/patch/31837
*** Bug 82750 has been marked as a duplicate of this bug. ***
Hi, Can we have the dmesg with drm.debug=6 to see where it stops booting? We're in the first week of the merge window, a great time for kernel-wide regressions. Thanks,
The other bug has a dmesg with a backtrace. Let's see if they are indeed the same bug: 1.237439] BUG: unable to handle kernel NULL pointer dereference at 00000000000001bc [ 1.237447] IP: [<ffffffffa009ca13>] intel_lr_context_deferred_create+0x4f1/0x64e [i915] [ 1.237483] PGD 0 [ 1.237486] Oops: 0000 [#1] SMP [ 1.237489] Modules linked in: i915(+) button video drm_kms_helper drm [ 1.237497] CPU: 0 PID: 1433 Comm: udevd Not tainted 3.16.0_liuleill_ecca3f_20140818+ #2 [ 1.237501] task: ffff8801497fe660 ti: ffff8800a7fb8000 task.ti: ffff8800a7fb8000 [ 1.237504] RIP: 0010:[<ffffffffa009ca13>] [<ffffffffa009ca13>] intel_lr_context_deferred_create+0x4f1/0x64e [i915] [ 1.237535] RSP: 0018:ffff8800a7fbb9a0 EFLAGS: 00010202 [ 1.237538] RAX: 0000000000002270 RBX: ffff880149f21000 RCX: 0000000000000000 [ 1.237540] RDX: ffffea000527c840 RSI: ffff880002cf7a10 RDI: ffff880002c14380 [ 1.237543] RBP: ffff880002c141c0 R08: 0000000000000000 R09: ffff88014a00e000 [ 1.237545] R10: ffff88014a00f428 R11: 0000000000000001 R12: ffff8800a7e96e40 [ 1.237548] R13: 0000000000000000 R14: 0000000000000000 R15: ffff880002cf17d8 [ 1.237551] FS: 00007f9ef5682840(0000) GS:ffff88014ec00000(0000) knlGS:0000000000000000 [ 1.237554] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.237556] CR2: 00000000000001bc CR3: 00000000a7ee2000 CR4: 00000000003407f0 [ 1.237558] Stack: [ 1.237560] ffff8801493eb840 ffff880002c14380 ffffea000527c840 ffff8800a7dc1420 [ 1.237564] 0000001300000000 0000000000000001 ffff880002cf17d8 ffff880144e3a800 [ 1.237568] ffff8801493eb840 ffff880144e3a800 0000000000000048 ffff880002cf0000 [ 1.237572] Call Trace: [ 1.237599] [<ffffffffa009cc00>] ? logical_ring_init+0x90/0x13d [i915] [ 1.237625] [<ffffffffa009cd78>] ? intel_logical_rings_init+0xcb/0x3f3 [i915] [ 1.237653] [<ffffffffa008a4af>] ? i915_gem_init_hw+0x109/0x1bc [i915] [ 1.237678] [<ffffffffa008a6ea>] ? i915_gem_init+0x188/0x1e3 [i915] [ 1.237713] [<ffffffffa00dfc9a>] ? i915_driver_load+0xc0b/0xde0 [i915] [ 1.237719] [<ffffffff81060beb>] ? __wake_up+0x33/0x44 [ 1.237724] [<ffffffff81046172>] ? call_usermodehelper_exec+0xf0/0xfb [ 1.237728] [<ffffffff81040000>] ? __dequeue_signal+0xcd/0xfc [ 1.237733] [<ffffffff812dc908>] ? kobject_uevent_env+0x47a/0x4b2 [ 1.237738] [<ffffffff81380837>] ? get_device+0xe/0x16 [ 1.237743] [<ffffffff8170f7d1>] ? klist_add_tail+0x1b/0x3c [ 1.237747] [<ffffffff81381ba4>] ? device_add+0x4ec/0x4fd [ 1.237751] [<ffffffff812da708>] ? idr_replace+0x2d/0x93 [ 1.237760] [<ffffffffa0007570>] ? drm_dev_register+0x72/0xe3 [drm] [ 1.237769] [<ffffffffa0009492>] ? drm_get_pci_dev+0xf4/0x1b0 [drm] [ 1.237773] [<ffffffff8138a059>] ? __pm_runtime_resume+0x58/0x64 [ 1.237778] [<ffffffff81300aa2>] ? local_pci_probe+0x34/0x77 [ 1.237782] [<ffffffff81300ba6>] ? pci_device_probe+0xc1/0xe5 [ 1.237786] [<ffffffff81383bdd>] ? driver_probe_device+0x9b/0x1cf [ 1.237789] [<ffffffff81383d95>] ? __driver_attach+0x53/0x73 [ 1.237793] [<ffffffff81383d42>] ? __device_attach+0x31/0x31 [ 1.237796] [<ffffffff813824fa>] ? bus_for_each_dev+0x6e/0x78 [ 1.237799] [<ffffffff813834d2>] ? bus_add_driver+0xfb/0x1c4 [ 1.237803] [<ffffffff81384289>] ? driver_register+0x83/0xbb [ 1.237806] [<ffffffffa011e000>] ? 0xffffffffa011dfff [ 1.237809] [<ffffffff810002fa>] ? do_one_initcall+0xe3/0x165 [ 1.237814] [<ffffffff810822e7>] ? load_module+0x163b/0x1b37 [ 1.237818] [<ffffffff8107fd2d>] ? store_uevent+0x30/0x30 [ 1.237822] [<ffffffff81082871>] ? SyS_init_module+0x8e/0x99 [ 1.237826] [<ffffffff8171bc12>] ? system_call_fastpath+0x16/0x1b [ 1.237828] Code: 47 0c 05 78 02 00 00 89 83 b8 00 00 00 41 8b 47 0c 05 74 02 00 00 89 83 c0 00 00 00 41 8b 47 0c 05 70 02 00 00 89 83 c8 00 00 00 <41> 8b 86 bc 01 00 00 89 83 94 00 00 00 49 8b 86 b8 01 00 00 89 [ 1.237859] RIP [<ffffffffa009ca13>] intel_lr_context_deferred_create+0x4f1/0x64e [i915] [ 1.237888] RSP <ffff8800a7fbb9a0> [ 1.237890] CR2: 00000000000001bc [ 1.237893] ---[ end trace 351738523b7064ec ]---
I can't boot BDW on today's -nightly unless I pass i915.enable_execlists=0. I see the exact same bakctrace as menitoned by Damien in comment #5.
(In reply to comment #2) > Please try http://patchwork.freedesktop.org/patch/31837 This patch works.
I tested latest -nightly （49ceddc7b3b0e3f7eb21b9fb4c9b840cff630047）. System can boot up successfully.
Problem deferred.
> I tested latest -nightly （49ceddc7b3b0e3f7eb21b9fb4c9b840cff630047）. System > can boot up successfully. Verified.
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