apport information ** Tags added: apport-collected
** Description changed: On a Dell M3800, running Trusty, my screen goes blank (e.g. as if it were going idle, but still backlit) very often (around every 5-10 minutes). The only way I can get it back is to either close the laptop lid to suspend and wake it back up, or to switch TTYs. The relevant syslog snippets always look something like this: Nov 24 11:52:04 Pandora dnsmasq[1813]: reading /etc/resolv.conf Nov 24 11:52:04 Pandora dnsmasq[1813]: using nameserver 127.0.1.1#53 Nov 24 11:52:04 Pandora dnsmasq[1473]: reading /etc/resolv.conf Nov 24 11:52:04 Pandora dnsmasq[1473]: using nameserver 127.0.1.1#53 Nov 24 11:53:31 Pandora dnsmasq-dhcp[1473]: DHCPREQUEST(lxcbr0) 10.0.3.129 00:16:3e:8e:7a:88 Nov 24 11:53:31 Pandora dnsmasq-dhcp[1473]: DHCPACK(lxcbr0) 10.0.3.129 00:16:3e:8e:7a:88 snapcraft Nov 24 11:54:09 Pandora dnsmasq-dhcp[1473]: DHCPREQUEST(lxcbr0) 10.0.3.44 00:16:3e:d0:df:55 Nov 24 11:54:09 Pandora dnsmasq-dhcp[1473]: DHCPACK(lxcbr0) 10.0.3.44 00:16:3e:d0:df:55 ros Nov 24 11:54:50 Pandora kernel: [105852.851699] Modules linked in: veth nfnetlink_queue nfnetlink_log nfnetlink xt_conntrack ipt_REJECT pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) ip6table_filter ip6_tables ebtable_nat ebtables bbswitch(OE) vboxdrv(OE) xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables dm_crypt pn544_mei mei_phy pn544 hci nfc uvcvideo dell_laptop dcdbas videobuf2_vmalloc videobuf2_memops snd_hda_codec_realtek videobuf2_core v4l2_common intel_rapl x86_pkg_temp_thermal videodev snd_hda_codec_generic snd_hda_codec_hdmi intel_powerclamp coretemp kvm_intel dm_multipath kvm scsi_dh crct10dif_pclmul crc32_pclmul snd_hda_intel ghash_clmulni_intel snd_hda_controller snd_hda_codec media wl(POE)<4>[105852.851845] Hardware name: Dell Inc. Dell Precision M3800/Dell Precision M3800, BIOS A09 01/08/2015 Nov 24 11:54:50 Pandora kernel: [105852.851865] ffff8800512d3c38 ffffffff8106dead ffff880464100000 ffff880463772000 Nov 24 11:54:50 Pandora kernel: [105852.851891] [<ffffffff817671ee>] dump_stack+0x45/0x56 Nov 24 11:54:50 Pandora kernel: [105852.851960] [<ffffffffc030206f>] ? lpt_disable_clkout_dp+0x8f/0xd0 [i915] Nov 24 11:54:50 Pandora kernel: [105852.852045] [<ffffffff813d08e0>] ? pci_legacy_suspend_late+0xf0/0xf0 Nov 24 11:54:50 Pandora kernel: [105852.852064] [<ffffffff814c4866>] __rpm_callback+0x36/0xc0 Nov 24 11:54:50 Pandora kernel: [105852.852079] [<ffffffff814c61f2>] pm_runtime_work+0xb2/0xe0 Nov 24 11:54:50 Pandora kernel: [105852.852097] [<ffffffff8108ac50>] ? rescuer_thread+0x380/0x380 Nov 24 11:54:50 Pandora kernel: [105852.852121] [<ffffffff8176f898>] ret_from_fork+0x58/0x90 Nov 24 11:54:50 Pandora kernel: [105852.852142] ------------[ cut here ]------------ Nov 24 11:54:50 Pandora kernel: [105852.852183] Modules linked in: veth nfnetlink_queue nfnetlink_log nfnetlink xt_conntrack ipt_REJECT pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) ip6table_filter ip6_tables ebtable_nat ebtables bbswitch(OE) vboxdrv(OE) xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables dm_crypt pn544_mei mei_phy pn544 hci nfc uvcvideo dell_laptop dcdbas videobuf2_vmalloc videobuf2_memops snd_hda_codec_realtek videobuf2_core v4l2_common intel_rapl x86_pkg_temp_thermal videodev snd_hda_codec_generic snd_hda_codec_hdmi intel_powerclamp coretemp kvm_intel dm_multipath kvm scsi_dh crct10dif_pclmul crc32_pclmul snd_hda_intel ghash_clmulni_intel snd_hda_controller snd_hda_codec media wl(POE)<4>[105852.852310] Hardware name: Dell Inc. Dell Precision M3800/Dell Precision M3800, BIOS A09 01/08/2015 Nov 24 11:54:50 Pandora kernel: [105852.852323] ffff8800512d3c38 ffffffff8106dead ffff880464100000 ffff880463768b68 Nov 24 11:54:50 Pandora kernel: [105852.852342] [<ffffffff817671ee>] dump_stack+0x45/0x56 Nov 24 11:54:50 Pandora kernel: [105852.852399] [<ffffffffc0313844>] hsw_enable_pc8+0x5f4/0x600 [i915] Nov 24 11:54:50 Pandora kernel: [105852.852444] [<ffffffff813d0941>] pci_pm_runtime_suspend+0x61/0x140 Nov 24 11:54:50 Pandora kernel: [105852.852460] [<ffffffff814c4914>] rpm_callback+0x24/0x80 Nov 24 11:54:50 Pandora kernel: [105852.852476] [<ffffffff8108a602>] process_one_work+0x182/0x450 Nov 24 11:54:50 Pandora kernel: [105852.852494] [<ffffffff81091602>] kthread+0xd2/0xf0 Nov 24 11:54:50 Pandora kernel: [105852.852516] [<ffffffff81091530>] ? kthread_create_on_node+0x1c0/0x1c0 Nov 24 11:54:50 Pandora kernel: [105852.852555] WARNING: CPU: 0 PID: 11274 at /build/linux-lts-utopic-KV5w7M/linux-lts-utopic-3.16.0/drivers/gpu/drm/i915/intel_display.c:7262 hsw_enable_pc8+0x5d5/0x600 [i915]() Nov 24 11:54:50 Pandora kernel: btusb hid_multitouch bnep rfcomm aesni_intel aes_x86_64 snd_hwdep lrw gf128mul bluetooth snd_pcm glue_helper ablk_helper cryptd snd_seq_midi 6lowpan_iphc snd_seq_midi_event cfg80211 snd_rawmidi joydev snd_seq serio_raw snd_seq_device snd_timer rtsx_pci_ms snd lpc_ich memstick soundcore mei_me shpchp mei binfmt_misc int3403_thermal dell_wmi sparse_keymap mxm_wmi wmi dell_smo8800 dell_rbtn mac_hid nls_iso8859_1 parport_pc ppdev lp parport hid_generic usbhid hid rtsx_pci_sdmmc i915 i2c_algo_bit drm_kms_helper ahci drm psmouse libahci rtsx_pci video [last unloaded: nvidia] Nov 24 11:54:50 Pandora kernel: [105852.852688] Workqueue: pm pm_runtime_work Nov 24 11:54:50 Pandora kernel: [105852.852702] ffff880463768b70 ffff88046928b098 ffff88046928b098 ffff8800512d3c98 Nov 24 11:54:50 Pandora kernel: [105852.852721] [<ffffffff8106dead>] warn_slowpath_common+0x7d/0xa0 Nov 24 11:54:50 Pandora kernel: [105852.852795] [<ffffffffc02bc87d>] intel_runtime_suspend+0x1cd/0x8b0 [i915] Nov 24 11:54:50 Pandora kernel: [105852.852819] [<ffffffff813d08e0>] ? pci_legacy_suspend_late+0xf0/0xf0 Nov 24 11:54:50 Pandora kernel: [105852.852833] [<ffffffff814c4a81>] rpm_suspend+0x111/0x640 Nov 24 11:54:50 Pandora kernel: [105852.852849] [<ffffffff8108ad71>] worker_thread+0x121/0x570 Nov 24 11:54:50 Pandora kernel: [105852.852868] [<ffffffff81091530>] ? kthread_create_on_node+0x1c0/0x1c0 Nov 24 11:54:50 Pandora kernel: [105852.852886] ---[ end trace b827226dd80816a5 ]--- Nov 24 11:54:50 Pandora kernel: [105852.852929] PCH PWM1 enabled Nov 24 11:54:50 Pandora kernel: [105852.853052] CPU: 0 PID: 11274 Comm: kworker/0:1 Tainted: P W OE 3.16.0-53-generic #72~14.04.1-Ubuntu Nov 24 11:54:50 Pandora kernel: [105852.853062] 0000000000000009 ffff8800512d3c00 ffffffff817671ee ffff8800512d3c48 Nov 24 11:54:50 Pandora kernel: [105852.853078] Call Trace: Nov 24 11:54:50 Pandora kernel: [105852.853098] [<ffffffff8106df1c>] warn_slowpath_fmt+0x4c/0x50 Nov 24 11:54:50 Pandora kernel: [105852.853175] [<ffffffff813d08e0>] ? pci_legacy_suspend_late+0xf0/0xf0 Nov 24 11:54:50 Pandora kernel: [105852.853192] [<ffffffff814c4866>] __rpm_callback+0x36/0xc0 Nov 24 11:54:50 Pandora kernel: [105852.853207] [<ffffffff814c61f2>] pm_runtime_work+0xb2/0xe0 Nov 24 11:54:50 Pandora kernel: [105852.853223] [<ffffffff8108ac50>] ? rescuer_thread+0x380/0x380 Nov 24 11:54:50 Pandora kernel: [105852.853245] [<ffffffff8176f898>] ret_from_fork+0x58/0x90 Nov 24 11:54:51 Pandora kernel: [105853.669207] [drm:hsw_unclaimed_reg_clear] *ERROR* Unknown unclaimed register before writing to 70088 Nov 24 11:54:51 Pandora kernel: [105853.669232] [drm:hsw_unclaimed_reg_clear] *ERROR* Unknown unclaimed register before writing to 70084 Nov 24 11:54:51 Pandora kernel: [105853.680116] [drm:hsw_unclaimed_reg_check] *ERROR* Unclaimed write to 70084 Nov 24 11:54:51 Pandora kernel: [105853.689971] [drm:hsw_unclaimed_reg_clear] *ERROR* Unknown unclaimed register before writing to 70088 Nov 24 11:54:51 Pandora kernel: [105853.689993] [drm:hsw_unclaimed_reg_check] *ERROR* Unclaimed write to 70084 Nov 24 11:54:51 Pandora kernel: [105853.699852] [drm:hsw_unclaimed_reg_clear] *ERROR* Unknown unclaimed register before writing to 70088 Nov 24 11:54:51 Pandora kernel: [105853.699865] [drm:hsw_unclaimed_reg_check] *ERROR* Unclaimed write to 70088 Nov 24 11:54:51 Pandora kernel: [105853.699870] [drm:hsw_unclaimed_reg_clear] *ERROR* Unknown unclaimed register before writing to 70084 Nov 24 11:54:51 Pandora kernel: [105853.699874] [drm:hsw_unclaimed_reg_check] *ERROR* Unclaimed write to 70084 Nov 24 11:54:51 Pandora kernel: [105853.709726] [drm:hsw_unclaimed_reg_clear] *ERROR* Unknown unclaimed register before writing to 70088 Nov 24 11:54:51 Pandora kernel: [105853.709739] [drm:hsw_unclaimed_reg_check] *ERROR* Unclaimed write to 70088 Nov 24 11:54:51 Pandora kernel: [105853.709743] [drm:hsw_unclaimed_reg_clear] *ERROR* Unknown unclaimed register before writing to 70084 Nov 24 11:54:51 Pandora kernel: [105853.709746] [drm:hsw_unclaimed_reg_check] *ERROR* Unclaimed write to 70084 Nov 24 11:54:51 Pandora kernel: [105853.716552] [drm:hsw_unclaimed_reg_clear] *ERROR* Unknown unclaimed register before writing to 70088 Nov 24 11:54:51 Pandora kernel: [105853.716565] [drm:hsw_unclaimed_reg_check] *ERROR* Unclaimed write to 70088 Nov 24 11:54:51 Pandora kernel: [105853.716576] [drm:hsw_unclaimed_reg_clear] *ERROR* Unknown unclaimed register before writing to 70084 Nov 24 11:54:51 Pandora kernel: [105853.716585] [drm:hsw_unclaimed_reg_check] *ERROR* Unclaimed write to 70084 Nov 24 11:54:53 Pandora kernel: [105855.740043] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.16.0-53-generic 3.16.0-53.72~14.04.1 ProcVersionSignature: Ubuntu 3.16.0-53.72~14.04.1-generic 3.16.7-ckt18 Uname: Linux 3.16.0-53-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.14.1-0ubuntu3.19 Architecture: amd64 CurrentDesktop: Unity Date: Tue Nov 24 12:08:21 2015 EcryptfsInUse: Yes InstallationDate: Installed on 2015-05-03 (204 days ago) InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1) SourcePackage: linux-lts-utopic UpgradeStatus: No upgrade log present (probably fresh install) + --- + ApportVersion: 2.14.1-0ubuntu3.19 + Architecture: amd64 + AudioDevicesInUse: + USER PID ACCESS COMMAND + /dev/snd/controlC0: krf 3498 F.... pulseaudio + /dev/snd/pcmC1D0p: krf 3498 F...m pulseaudio + /dev/snd/controlC1: krf 3498 F.... pulseaudio + CurrentDesktop: Unity + DistroRelease: Ubuntu 14.04 + EcryptfsInUse: Yes + InstallationDate: Installed on 2015-05-03 (232 days ago) + InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1) + MachineType: Dell Inc. Dell Precision M3800 + NonfreeKernelModules: wl + Package: linux (not installed) + ProcFB: 0 inteldrmfb + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-57-generic.efi.signed root=UUID=e732b755-d7b8-47ba-a405-64f45044bcf6 ro quiet splash vt.handoff=7 + ProcVersionSignature: Ubuntu 3.16.0-57.77~14.04.1-generic 3.16.7-ckt20 + RelatedPackageVersions: + linux-restricted-modules-3.16.0-57-generic N/A + linux-backports-modules-3.16.0-57-generic N/A + linux-firmware 1.127.19 + Tags: trusty + Uname: Linux 3.16.0-57-generic x86_64 + UpgradeStatus: No upgrade log present (probably fresh install) + UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo vboxusers + _MarkForUpload: True + dmi.bios.date: 01/08/2015 + dmi.bios.vendor: Dell Inc. + dmi.bios.version: A09 + dmi.board.name: Dell Precision M3800 + dmi.board.vendor: Dell Inc. + dmi.board.version: A09 + dmi.chassis.type: 8 + dmi.chassis.vendor: Dell Inc. + dmi.chassis.version: Not Specified + dmi.modalias: dmi:bvnDellInc.:bvrA09:bd01/08/2015:svnDellInc.:pnDellPrecisionM3800:pvrA09:rvnDellInc.:rnDellPrecisionM3800:rvrA09:cvnDellInc.:ct8:cvrNotSpecified: + dmi.product.name: Dell Precision M3800 + dmi.product.version: A09 + dmi.sys.vendor: Dell Inc. ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/1519427/+attachment/4538941/+files/AlsaInfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1519427 Title: Screen goes blank every 5 minutes, requires TTY switch to get it back. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1519427/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs