On Sun, Sep 8, 2013 at 12:53 PM, Tobias Klausmann <tobias.johannes.klausm...@mni.thm.de> wrote: > Hi there, > with the latest snapshot of linus tree, i see a stack trace and my system > does not start X! Maybe someone finds this useful! (3.11 is working like a > charm)
Looks like you have Optimus (intel + nvidia), and the backtrace has runtime pm in it, which is something new Dave added for 3.12, adding him in explicitly. The simplest explanation is that disp->init is NULL. And it seems like there are no outputs from the earlier nouveau init prints. I guess that the call to nouveau_display_resume from nouveau_pmops_runtime_resume should be guarded by a if (dev->mode_config.num_crtc) like it is everywhere else. -ilia > > BUG: unable to handle kernel NULL pointer dereference at (null) > IP: [< (null)>] (null) > PGD 24eaa0067 PUD 24e7ac067 PMD 0 > Oops: 0010 [#1] PREEMPT SMP > Modules linked in: bnep snd_hda_codec_hdmi snd_hda_codec_realtek fuse > x86_pkg_temp_thermal coretemp snd_hda_intel kvm_intel snd_hda_codec > snd_hwdep kvm snd_pcm uvcvideo snd_seq videobuf2_core snd_timer > crct10dif_pclmul crc32_pclmul arc4 crc32c_intel snd_seq_device > ghash_clmulni_intel ath9k videodev snd sdhci_pci sdhci aesni_intel iTCO_wdt > iTCO_vendor_support mac80211 ablk_helper acer_wmi ath9k_common ath3k > ath9k_hw sr_mod lpc_ich cryptd mmc_core joydev btusb sg ath cfg80211 tg3 > acpi_cpufreq ptp pps_core ipheth cdrom videobuf2_vmalloc mfd_core > sparse_keymap soundcore serio_raw bluetooth videobuf2_memops shpchp rfkill > i2c_i801 pcspkr snd_page_alloc lrw gf128mul glue_helper aes_x86_64 microcode > battery ac autofs4 nouveau i915 ttm drm_kms_helper drm xhci_hcd mxm_wmi > i2c_algo_bit wmi video button processor thermal_sys scsi_dh_emc scsi_dh_alua > scsi_dh_rdac scsi_dh_hp_sw scsi_dh > CPU: 0 PID: 792 Comm: Xorg Not tainted 3.11.0-desktop+ #1 > Hardware name: Acer Aspire V3-571G/VA50_HC_CR, BIOS V1.13 10/09/2012 > task: ffff880253031040 ti: ffff880253256000 task.ti: ffff880253256000 > RIP: 0010:[<0000000000000000>] [< (null)>] (null) > RSP: 0018:ffff8802532579a0 EFLAGS: 00010246 > RAX: ffff88024fabb000 RBX: ffff88024f3e2800 RCX: ffff88024eacf5c0 > RDX: ffff88024fabb000 RSI: ffff88024f7fe760 RDI: ffff88024f3e2800 > RBP: ffff88024ea2f480 R08: 0000000000000004 R09: 0000000000000000 > R10: ffff88025f1e1f80 R11: 000000000000000f R12: ffff88024f3e2800 > R13: ffff88024f3e2800 R14: 0000000000000004 R15: ffff880253257ab8 > FS: 00007fe73cdd8880(0000) GS:ffff88025f200000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000000000000 CR3: 000000025022c000 CR4: 00000000001407f0 > Stack: > ffffffffa021e4a2 ffff88024f234000 ffff88024f3e2800 ffff88024f3e2c38 > 0000000000000000 ffff88024f3e2800 ffffffffa021eda5 ffff88025401d000 > ffff88024fabb000 ffff88025401d000 ffffffffa020e7cb ffff880253257ab8 > Call Trace: > [<ffffffffa021e4a2>] ? nouveau_display_init+0x42/0xd0 [nouveau] > [<ffffffffa021eda5>] ? nouveau_display_resume+0x15/0xa0 [nouveau] > [<ffffffffa020e7cb>] ? nouveau_pmops_runtime_resume+0x9b/0x100 [nouveau] > [<ffffffff812ac745>] ? pci_pm_runtime_resume+0x85/0xc0 > [<ffffffff812ac6c0>] ? pci_restore_standard_config+0x30/0x30 > [<ffffffff8137b6f6>] ? __rpm_callback+0x36/0x80 > [<ffffffff8137b768>] ? rpm_callback+0x28/0x90 > [<ffffffff8137c48d>] ? rpm_resume+0x39d/0x570 > [<ffffffff81071483>] ? __wake_up+0x43/0x70 > [<ffffffff8137c8f8>] ? __pm_runtime_resume+0x48/0x70 > [<ffffffffa020e5a2>] ? nouveau_drm_open+0x42/0x1d0 [nouveau] > [<ffffffff811bb858>] ? ext4_da_write_end+0xa8/0x2b0 > [<ffffffff811ef559>] ? jbd2_journal_stop+0x1d9/0x2c0 > [<ffffffff8124a56f>] ? apparmor_capable+0x1f/0x90 > [<ffffffffa00c5cab>] ? drm_open+0x28b/0x6e0 [drm] > [<ffffffffa00c6206>] ? drm_stub_open+0x106/0x1a0 [drm] > [<ffffffff81143bc0>] ? cdev_put+0x30/0x30 > [<ffffffff81143c56>] ? chrdev_open+0x96/0x1d0 > [<ffffffff81143bc0>] ? cdev_put+0x30/0x30 > [<ffffffff8113d186>] ? do_dentry_open+0x216/0x2a0 > [<ffffffff8113d238>] ? finish_open+0x28/0x40 > [<ffffffff8114e5e9>] ? do_last+0x709/0xe70 > [<ffffffff8114a9e8>] ? link_path_walk+0x68/0x860 > [<ffffffff81124b24>] ? kmem_cache_alloc+0x1b4/0x1d0 > [<ffffffff8114ee21>] ? path_openat+0xd1/0x660 > [<ffffffff8114f755>] ? do_filp_open+0x45/0xb0 > [<ffffffff8115bb65>] ? __alloc_fd+0xc5/0x120 > [<ffffffff8113e5f0>] ? do_sys_open+0x140/0x230 > [<ffffffff8156c5ed>] ? system_call_fastpath+0x1a/0x1f > Code: Bad RIP value. > RIP [< (null)>] (null) > RSP <ffff8802532579a0> > CR2: 0000000000000000 > ---[ end trace b6ce5041151511a5 ]--- > > Thanks, > Tobias Klausmann > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
