This bug makes my laptop unusable, wish I haven't updated to 17.04 :( any workaround?
-- 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/1677673 Title: System soft-freezes, BUG: unable to handle kernel NULL pointer dereference at 0000000000000018 in journalctl at gen8_ppgtt_alloc_page_directories.isra.38+0x115/0x250 Status in linux package in Ubuntu: Confirmed Bug description: I just upgraded to 17.04. It appears that now leaving the system locked for long enough now makes it unable to respond to any input but SysRq. This apepars to be the only relevant bit in `journalctl --boot -1`: BUG: unable to handle kernel NULL pointer dereference at 0000000000000018 IP: gen8_ppgtt_alloc_page_directories.isra.38+0x115/0x250 [i915] PGD 0 Oops: 0002 [#1] SMP Modules linked in: ccm pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ip snd_soc_ssm4567 snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi snd_soc_core cfg80211 snd_compress ac97_bus snd_pcm_dmaengine snd_hda_intel lpc_ich snd_seq_ ghash_clmulni_intel pcbc i915 aesni_intel aes_x86_64 crypto_simd glue_helper cryptd sdhci_pci i2c_algo_bit drm_kms_helper syscopyarea psmouse ahci sysfillrect libahci e100 CPU: 3 PID: 3826 Comm: chrome Tainted: G OE 4.10.0-14-generic #16-Ubuntu Hardware name: Dell Inc. Latitude E7250/0V8RX3, BIOS A09 11/18/2015 task: ffff99ddb372da00 task.stack: ffffb0ec037dc000 RIP: 0010:gen8_ppgtt_alloc_page_directories.isra.38+0x115/0x250 [i915] RSP: 0018:ffffb0ec037df880 EFLAGS: 00010246 RAX: ffff99dd0367b880 RBX: 0000000000000003 RCX: 0000000000000003 RDX: 0000000000000000 RSI: ffff99ddb737e000 RDI: ffff99de4ad90000 RBP: ffffb0ec037df8d8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: ffff99ddc994a000 R13: ffff99dcd02e2bf0 R14: 00000000fffdf000 R15: 0000000000008000 FS: 00007fd3a0fa7b00(0000) GS:ffff99de5e580000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000018 CR3: 0000000174607000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: gen8_alloc_va_range_3lvl+0xfb/0x9e0 [i915] ? __alloc_pages_nodemask+0xff/0x260 gen8_alloc_va_range+0x23d/0x470 [i915] i915_vma_bind+0x7e/0x170 [i915] __i915_vma_do_pin+0x2a5/0x450 [i915] i915_gem_execbuffer_reserve_vma.isra.31+0x144/0x1b0 [i915] i915_gem_execbuffer_reserve.isra.32+0x39e/0x3d0 [i915] i915_gem_do_execbuffer.isra.38+0x4a2/0x1750 [i915] ? radix_tree_lookup_slot+0x22/0x50 ? shmem_getpage_gfp+0xf9/0xc10 i915_gem_execbuffer2+0xa1/0x1e0 [i915] drm_ioctl+0x21b/0x4c0 [drm] ? i915_gem_execbuffer+0x310/0x310 [i915] ? __seccomp_filter+0x67/0x250 do_vfs_ioctl+0xa3/0x610 ? __secure_computing+0x3f/0xd0 ? syscall_trace_enter+0xcd/0x2e0 SyS_ioctl+0x79/0x90 do_syscall_64+0x5b/0xc0 entry_SYSCALL64_slow_path+0x25/0x25 RIP: 0033:0x7fd39a33a907 RSP: 002b:00007ffff6323818 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000018a20a505000 RCX: 00007fd39a33a907 RDX: 00007ffff6323860 RSI: 00000000c0406469 RDI: 000000000000000e RBP: 00007ffff6323860 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000038 R11: 0000000000000246 R12: 00000000c0406469 R13: 000000000000000e R14: 0000000000000000 R15: 0000000000000000 Code: e6 48 8b 90 20 03 00 00 48 8b b8 d8 02 00 00 48 8b 52 08 48 83 ca 03 e8 ca cd ff ff 48 8b 45 b0 48 8b 4d c8 48 8b 10 48 8b 45 d0 <4c> 89 24 ca 48 0f ab 08 0f 1f 44 00 RIP: gen8_ppgtt_alloc_page_directories.isra.38+0x115/0x250 [i915] RSP: ffffb0ec037df880 CR2: 0000000000000018 ---[ end trace 2a4103476767c23b ]--- I walked to my computer 12 minutes later, finding it soft-locked as described above. I realize that this appears somewhat far removed from the real cause of the problem, so please let me know what other data I can provide to facilitate the debugging process. ProblemType: Bug DistroRelease: Ubuntu 17.04 Package: linux-image-4.10.0-14-generic 4.10.0-14.16 ProcVersionSignature: Ubuntu 4.10.0-14.16-generic 4.10.3 Uname: Linux 4.10.0-14-generic x86_64 ApportVersion: 2.20.4-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: sraffa 2780 F.... pulseaudio /dev/snd/controlC0: sraffa 2780 F.... pulseaudio CurrentDesktop: Unity:Unity7 Date: Thu Mar 30 17:44:00 2017 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=aca70873-b3e7-46b8-a5df-18e8752a0640 InstallationDate: Installed on 2015-11-02 (514 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) MachineType: Dell Inc. Latitude E7250 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.10.0-14-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.10.0-14-generic N/A linux-backports-modules-4.10.0-14-generic N/A linux-firmware 1.164 SourcePackage: linux UpgradeStatus: Upgraded to zesty on 2017-03-29 (0 days ago) dmi.bios.date: 11/18/2015 dmi.bios.vendor: Dell Inc. dmi.bios.version: A09 dmi.board.name: 0V8RX3 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA09:bd11/18/2015:svnDellInc.:pnLatitudeE7250:pvr:rvnDellInc.:rn0V8RX3:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E7250 dmi.sys.vendor: Dell Inc. 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