@kaihengfeng: Thank you! I tested it and can confirm that the Kernel you linked to (Ubuntu 4.15.0-45.48~lp1813663-generic 4.15.18) works again.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1813752 Title: Kernel oops - unable to handle kernel NULL pointer dereference; IP: intel_ddi_post_disable+0x54/0x170 [i915] Status in linux package in Ubuntu: Confirmed Bug description: I use Ubuntu 18.04.1 LTS on a Lenovo Thinkpad T460p. Today I upgraded to Kernel 4.15.0-44 – since then my system crashes when logging in (when the display resolution should switch). The previous Kernel 4.15.0-43 works fine, though. Here's the crash: Jan 29 11:08:05 hho-pc kernel: [ 20.127785] BUG: unable to handle kernel NULL pointer dereference at 0000000000000245 Jan 29 11:08:05 hho-pc kernel: [ 20.127868] IP: intel_ddi_post_disable+0x54/0x170 [i915] Jan 29 11:08:05 hho-pc kernel: [ 20.127873] PGD 0 P4D 0 Jan 29 11:08:05 hho-pc kernel: [ 20.127882] Oops: 0000 [#1] SMP PTI Jan 29 11:08:05 hho-pc kernel: [ 20.127887] Modules linked in: ipt_MASQUERADE nf_nat_masquerade_ipv4 nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_filter xt_conntrack nf_nat nf_conntrack libcrc32c br_netfilter bridge stp llc ccm aufs pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) overlay vboxdrv(OE) bnep binfmt_misc nls_iso8859_1 uvcvideo btusb btrtl videobuf2_vmalloc btbcm videobuf2_memops intel_rapl btintel videobuf2_v4l2 snd_hda_codec_hdmi cdc_ether videobuf2_core usbnet bluetooth mii option usb_wwan videodev x86_pkg_temp_thermal usbserial intel_powerclamp media coretemp ecdh_generic arc4 kvm_intel snd_hda_codec_realtek snd_hda_codec_generic kvm snd_hda_intel irqbypass snd_hda_codec crct10dif_pclmul crc32_pclmul snd_hda_core thinkpad_acpi ghash_clmulni_intel Jan 29 11:08:05 hho-pc kernel: [ 20.127985] snd_hwdep pcbc snd_pcm nvram snd_seq_midi aesni_intel snd_seq_midi_event snd_rawmidi aes_x86_64 crypto_simd glue_helper cryptd snd_seq input_leds iwlmvm mac80211 joydev iwlwifi rtsx_pci_ms intel_cstate snd_seq_device memstick intel_rapl_perf snd_timer serio_raw cfg80211 wmi_bmof snd mei_me soundcore mac_hid intel_pch_thermal mei shpchp sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 hid_generic usbhid hid rtsx_pci_sdmmc nouveau i915 mxm_wmi ttm i2c_algo_bit drm_kms_helper e1000e syscopyarea sysfillrect sysimgblt fb_sys_fops psmouse ptp pps_core drm ahci i2c_i801 rtsx_pci libahci wmi video Jan 29 11:08:05 hho-pc kernel: [ 20.128082] CPU: 6 PID: 3769 Comm: Xorg Tainted: G OE 4.15.0-44-generic #47-Ubuntu Jan 29 11:08:05 hho-pc kernel: [ 20.128086] Hardware name: LENOVO 20FW003NGE/20FW003NGE, BIOS R07ET87W (2.27 ) 09/27/2018 Jan 29 11:08:05 hho-pc kernel: [ 20.128150] RIP: 0010:intel_ddi_post_disable+0x54/0x170 [i915] Jan 29 11:08:05 hho-pc kernel: [ 20.128155] RSP: 0018:ffffc01a89477a60 EFLAGS: 00010297 Jan 29 11:08:05 hho-pc kernel: [ 20.128161] RAX: 0000000000000007 RBX: ffff9cd490be9000 RCX: ffffffffc034d272 Jan 29 11:08:05 hho-pc kernel: [ 20.128165] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9cd490be9000 Jan 29 11:08:05 hho-pc kernel: [ 20.128170] RBP: ffffc01a89477a90 R08: 0000000000000007 R09: 0000000000000000 Jan 29 11:08:05 hho-pc kernel: [ 20.128174] R10: 0000000000000159 R11: 00000000000000c1 R12: 0000000000000000 Jan 29 11:08:05 hho-pc kernel: [ 20.128178] R13: ffff9cd490be9000 R14: ffff9cd48f7c8000 R15: ffff9cd4bcdc3000 Jan 29 11:08:05 hho-pc kernel: [ 20.128184] FS: 00007fdbc113e600(0000) GS:ffff9cd4c1580000(0000) knlGS:0000000000000000 Jan 29 11:08:05 hho-pc kernel: [ 20.128189] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jan 29 11:08:05 hho-pc kernel: [ 20.128193] CR2: 0000000000000245 CR3: 00000007cd49c002 CR4: 00000000003606e0 Jan 29 11:08:05 hho-pc kernel: [ 20.128198] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Jan 29 11:08:05 hho-pc kernel: [ 20.128202] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Jan 29 11:08:05 hho-pc kernel: [ 20.128205] Call Trace: Jan 29 11:08:05 hho-pc kernel: [ 20.128267] ? intel_dp_sink_dpms+0xbb/0xf0 [i915] Jan 29 11:08:05 hho-pc kernel: [ 20.128324] intel_mst_post_disable_dp+0x99/0xd0 [i915] Jan 29 11:08:05 hho-pc kernel: [ 20.128384] intel_encoders_post_disable.isra.102+0x66/0x80 [i915] Jan 29 11:08:05 hho-pc kernel: [ 20.128438] haswell_crtc_disable+0xe8/0x150 [i915] Jan 29 11:08:05 hho-pc kernel: [ 20.128493] intel_atomic_commit_tail+0x7ea/0xd30 [i915] Jan 29 11:08:05 hho-pc kernel: [ 20.128545] intel_atomic_commit+0x277/0x2b0 [i915] Jan 29 11:08:05 hho-pc kernel: [ 20.128579] drm_atomic_commit+0x51/0x60 [drm] Jan 29 11:08:05 hho-pc kernel: [ 20.128608] drm_atomic_connector_commit_dpms+0xef/0x100 [drm] Jan 29 11:08:05 hho-pc kernel: [ 20.128635] drm_mode_obj_set_property_ioctl+0x176/0x280 [drm] Jan 29 11:08:05 hho-pc kernel: [ 20.128663] ? drm_mode_connector_set_obj_prop+0x80/0x80 [drm] Jan 29 11:08:05 hho-pc kernel: [ 20.128686] drm_mode_connector_property_set_ioctl+0x3f/0x60 [drm] Jan 29 11:08:05 hho-pc kernel: [ 20.128710] drm_ioctl_kernel+0x5f/0xb0 [drm] Jan 29 11:08:05 hho-pc kernel: [ 20.128733] drm_ioctl+0x31b/0x3d0 [drm] Jan 29 11:08:05 hho-pc kernel: [ 20.128756] ? drm_mode_connector_set_obj_prop+0x80/0x80 [drm] Jan 29 11:08:05 hho-pc kernel: [ 20.128764] ? vfs_writev+0xb9/0x110 Jan 29 11:08:05 hho-pc kernel: [ 20.128773] do_vfs_ioctl+0xa8/0x630 Jan 29 11:08:05 hho-pc kernel: [ 20.128782] ? __sys_recvmsg+0x80/0x90 Jan 29 11:08:05 hho-pc kernel: [ 20.128789] SyS_ioctl+0x79/0x90 Jan 29 11:08:05 hho-pc kernel: [ 20.128798] do_syscall_64+0x73/0x130 Jan 29 11:08:05 hho-pc kernel: [ 20.128807] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 Jan 29 11:08:05 hho-pc kernel: [ 20.128812] RIP: 0033:0x7fdbbe5385d7 Jan 29 11:08:05 hho-pc kernel: [ 20.128816] RSP: 002b:00007ffcc64f40c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 Jan 29 11:08:05 hho-pc kernel: [ 20.128822] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fdbbe5385d7 Jan 29 11:08:05 hho-pc kernel: [ 20.128827] RDX: 00007ffcc64f4100 RSI: 00000000c01064ab RDI: 000000000000000d Jan 29 11:08:05 hho-pc kernel: [ 20.128831] RBP: 00007ffcc64f4100 R08: 000055c248e6c5a0 R09: 000000000000000a Jan 29 11:08:05 hho-pc kernel: [ 20.128835] R10: 000055c24994eb40 R11: 0000000000000246 R12: 00000000c01064ab Jan 29 11:08:05 hho-pc kernel: [ 20.128839] R13: 000000000000000d R14: 000055c2495546f0 R15: 000055c248e5acb0 Jan 29 11:08:05 hho-pc kernel: [ 20.128844] Code: 0d f6 86 44 02 00 00 40 0f 85 81 00 00 00 83 f8 06 72 77 83 f8 08 76 13 83 f8 0a 75 6d 41 f6 86 60 06 00 00 40 0f 84 dd 00 00 00 <41> f6 84 24 45 02 00 00 08 4d 8d bd 00 01 00 00 74 3e 48 89 df Jan 29 11:08:05 hho-pc kernel: [ 20.128986] RIP: intel_ddi_post_disable+0x54/0x170 [i915] RSP: ffffc01a89477a60 Jan 29 11:08:05 hho-pc kernel: [ 20.128989] CR2: 0000000000000245 Jan 29 11:08:05 hho-pc kernel: [ 20.128995] ---[ end trace 8a95ed7827217c97 ]--- To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813752/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
