Here's something that popped up in my system log, don't know if it's related:
Apr 15 16:02:45 hidden-username kernel: [18175.627427] ------------[ cut here ]------------ Apr 15 16:02:45 hidden-username kernel: [18175.627468] WARNING: CPU: 3 PID: 76 at /var/lib/dkms/i915-3.16-3.13/1/build/drivers/gpu/drm/i915/intel_dp.c:3124 intel_dp_link_down+0x1a3/0x210 [i915]() Apr 15 16:02:45 hidden-username kernel: [18175.627470] Modules linked in: xt_addrtype xt_conntrack ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_filter ip_tables x_tables bridge stp llc aufs ctr ccm dm_crypt hid_generic arc4 rfcomm bnep intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel dm_multipath scsi_dh kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel uvcvideo videobuf2_vmalloc videobuf2_memops aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd cdc_mbim cdc_wdm videobuf2_core binfmt_misc videodev usbhid iwlmvm cdc_acm cdc_ncm usbnet mac80211 mii hid snd_seq_midi joydev btusb snd_seq_midi_event thinkpad_acpi serio_raw nvram snd_rawmidi rtsx_pci_ms snd_hda_codec_realtek bluetooth snd_hda_codec_hdmi memstick iwlwifi cfg80211 lpc_ich snd_hda_intel snd_hda_codec shpchp mei_me snd_hwdep mei snd_pcm snd_seq snd_seq_device snd_page_alloc snd_timer snd soundcore parport_pc intel_smartconnect mac_hi d ppdev lp parport rtsx_pci_sdmmc e1000e psmouse ptp rtsx_pci ahci i915(OX) i2c_algo_bit pps_core libahci drm_kms_helper(OX) drm(OX) wmi video(OX) Apr 15 16:02:45 hidden-username kernel: [18175.627530] CPU: 3 PID: 76 Comm: kworker/3:1 Tainted: G W OX 3.13.0-49-generic #83-Ubuntu Apr 15 16:02:45 hidden-username kernel: [18175.627532] Hardware name: LENOVO 20AL00BYMS/20AL00BYMS, BIOS GIET79WW (2.29 ) 01/09/2015 Apr 15 16:02:45 hidden-username kernel: [18175.627547] Workqueue: events i915_hotplug_work_func [i915] Apr 15 16:02:45 hidden-username kernel: [18175.627549] 0000000000000009 ffff88020df77c98 ffffffff81721b36 0000000000000000 Apr 15 16:02:45 hidden-username kernel: [18175.627553] ffff88020df77cd0 ffffffff810677dd ffff88020d430000 ffff88020d403800 Apr 15 16:02:45 hidden-username kernel: [18175.627556] 0000000081000006 0000000000000001 ffff880212fd60d8 ffff88020df77ce0 Apr 15 16:02:45 hidden-username kernel: [18175.627559] Call Trace: Apr 15 16:02:45 hidden-username kernel: [18175.627565] [<ffffffff81721b36>] dump_stack+0x45/0x56 Apr 15 16:02:45 hidden-username kernel: [18175.627569] [<ffffffff810677dd>] warn_slowpath_common+0x7d/0xa0 Apr 15 16:02:45 hidden-username kernel: [18175.627572] [<ffffffff810678ba>] warn_slowpath_null+0x1a/0x20 Apr 15 16:02:45 hidden-username kernel: [18175.627590] [<ffffffffa00f7593>] intel_dp_link_down+0x1a3/0x210 [i915] Apr 15 16:02:45 hidden-username kernel: [18175.627606] [<ffffffffa00fc945>] intel_dp_complete_link_train+0x105/0x360 [i915] Apr 15 16:02:45 hidden-username kernel: [18175.627622] [<ffffffffa00fd1b8>] intel_dp_check_link_status+0xb8/0x1a0 [i915] Apr 15 16:02:45 hidden-username kernel: [18175.627638] [<ffffffffa00f4198>] intel_ddi_hot_plug+0x28/0x30 [i915] Apr 15 16:02:45 hidden-username kernel: [18175.627652] [<ffffffffa00bcc4c>] i915_hotplug_work_func+0x1ec/0x310 [i915] Apr 15 16:02:45 hidden-username kernel: [18175.627657] [<ffffffff81083a82>] process_one_work+0x182/0x450 Apr 15 16:02:45 hidden-username kernel: [18175.627660] [<ffffffff81084871>] worker_thread+0x121/0x410 Apr 15 16:02:45 hidden-username kernel: [18175.627663] [<ffffffff81084750>] ? rescuer_thread+0x430/0x430 Apr 15 16:02:45 hidden-username kernel: [18175.627667] [<ffffffff8108b5b2>] kthread+0xd2/0xf0 Apr 15 16:02:45 hidden-username kernel: [18175.627670] [<ffffffff8108b4e0>] ? kthread_create_on_node+0x1c0/0x1c0 Apr 15 16:02:45 hidden-username kernel: [18175.627673] [<ffffffff8173258c>] ret_from_fork+0x7c/0xb0 Apr 15 16:02:45 hidden-username kernel: [18175.627676] [<ffffffff8108b4e0>] ? kthread_create_on_node+0x1c0/0x1c0 Apr 15 16:02:45 hidden-username kernel: [18175.627678] ---[ end trace 947ede35b1816ec6 ]--- -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1444442 Title: External screen turns grey or green after some random time. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1444442/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
