This happens often when my laptop even with power supply left alone for a while for the screens to get turn off. When I log back -in or press a key to get to login screen, the second monitor never turns on. I have to unplug and plug the monitor DVI cable to get the monitor to show the screen.
I have verified that Ubuntu 14.04 thinks that both the monitors are on even when just my laptop screen it working and external monitor is all blank ( no signal ). This is happening on my lenovo x1 carbon which has intel hd4000 graphics. ================= [ 11.201868] [drm:intel_dp_start_link_train] *ERROR* failed to enable link training [ 11.208716] [drm:intel_dp_complete_link_train] *ERROR* failed to start channel equalization [ 11.241197] [drm:cpt_verify_modeset] *ERROR* mode set failed: pipe B stuck [ 11.305306] ------------[ cut here ]------------ [ 11.305364] WARNING: CPU: 2 PID: 1250 at /var/lib/dkms/i915-3.15-3.13/0.01/build/drivers/gpu/drm/i915/intel_display.c:9763 intel_modeset_check_state+0x5bc/0x770 [i915]() [ 11.305365] encoder's hw state doesn't match sw tracking (expected 1, found 0) [ 11.305366] Modules linked in: ctr ccm acpi_call(OX) snd_hda_codec_hdmi snd_hda_codec_realtek rfcomm bnep bluetooth uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev hid_generic usbhid hid binfmt_misc joydev snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_page_alloc snd_seq_midi snd_seq_midi_event intel_rapl x86_pkg_temp_thermal snd_rawmidi intel_powerclamp coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_seq arc4 aesni_intel aes_x86_64 lrw gf128mul glue_helper iwldvm ablk_helper cryptd mac80211 serio_raw iwlwifi thinkpad_acpi cfg80211 snd_seq_device wmi nvram snd_timer snd soundcore mei_me parport_pc intel_smartconnect mei i915(OX) ppdev video lpc_ich drm_kms_helper(OX) drm(OX) i2c_algo_bit mac_hid lp parport psmouse ahci libahci sdhci_pci sdhci [ 11.305392] CPU: 2 PID: 1250 Comm: Xorg Tainted: G OX 3.13.0-37-generic #64-Ubuntu [ 11.305393] Hardware name: LENOVO 3460AJ1/3460AJ1, BIOS G6ETA7WW (2.67 ) 06/12/2014 [ 11.305394] 0000000000000009 ffff8800c6c11b80 ffffffff8171ed09 ffff8800c6c11bc8 [ 11.305396] ffff8800c6c11bb8 ffffffff8106773d ffff8800c6c11c38 0000000000000001 [ 11.305398] ffff88021219f000 ffff88021219f320 ffff88020eab8800 ffff8800c6c11c18 [ 11.305399] Call Trace: [ 11.305403] [<ffffffff8171ed09>] dump_stack+0x45/0x56 [ 11.305406] [<ffffffff8106773d>] warn_slowpath_common+0x7d/0xa0 [ 11.305408] [<ffffffff810677ac>] warn_slowpath_fmt+0x4c/0x50 [ 11.305418] [<ffffffffa0129cdc>] intel_modeset_check_state+0x5bc/0x770 [i915] [ 11.305427] [<ffffffffa0129f25>] intel_set_mode+0x25/0x30 [i915] [ 11.305436] [<ffffffffa012adcd>] intel_crtc_set_config+0x8ed/0xdc0 [i915] [ 11.305447] [<ffffffffa0076351>] drm_mode_set_config_internal+0x61/0xf0 [drm] [ 11.305455] [<ffffffffa0079aa9>] drm_mode_setcrtc+0xd9/0x5e0 [drm] [ 11.305461] [<ffffffffa006a9e9>] drm_ioctl+0x229/0x600 [drm] [ 11.305469] [<ffffffffa00799d0>] ? drm_mode_setplane+0x410/0x410 [drm] [ 11.305473] [<ffffffff811d03a0>] do_vfs_ioctl+0x2e0/0x4c0 [ 11.305475] [<ffffffff811bf761>] ? __sb_end_write+0x31/0x60 [ 11.305477] [<ffffffff811bd2d2>] ? vfs_write+0x192/0x1f0 [ 11.305479] [<ffffffff811d0601>] SyS_ioctl+0x81/0xa0 [ 11.305482] [<ffffffff8172f82d>] system_call_fastpath+0x1a/0x1f [ 11.305483] ---[ end trace d0acff2a2d4c1e2d ]--- [ 11.305508] [drm:intel_pipe_config_compare] *ERROR* mismatch in has_dp_encoder (expected 1, found 0) [ 11.305510] ------------[ cut here ]------------ -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1314213 Title: [Lenovo ThinkPad X220] External DP1 monitor extremely unstable since upgrade to 14.04 Status in “xorg” package in Ubuntu: Confirmed Bug description: Since upgrade to 14.04, using my Dell BIZLINK DisplayPort to DVI Dual Link Adapter the external display on DP1 is extremely unstable. I get constant "[drm:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up" messages over dmesg. I used to get those with 13.10, but there was no stability issue. Once the laptop (Lenovo X220) is connected to the monitor (resolution is 2560x1600), if I run any program like xrandr or unity-control-center, the system immediately reverts from the external display to the laptop display, and often crashes becoming unresponsive. Every time I run xrandr or unity-control-center, it triggers 20 "[drm:intel_dp_i2c_aux_ch] *ERROR* too many retries, giving up" messages in dmesg and if I am using the external monitor it further triggers a reproducible crash. It is possible that this might be related to the DVI->DP adapter I am using. Due to an unresolved bug, the correct EDID for the monitor is not recognized, and I have to manually add that after each boot. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: genovese 2538 F.... pulseaudio CurrentDesktop: Unity Date: Tue Apr 29 10:00:31 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2013-01-21 (463 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5) MachineType: LENOVO 42872WU ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=1f880233-e827-4c00-b11a-2c7a4eb76497 ro quiet splash nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: Upgraded to trusty on 2014-04-18 (10 days ago) dmi.bios.date: 08/31/2012 dmi.bios.vendor: LENOVO dmi.bios.version: 8DET64WW (1.34 ) dmi.board.asset.tag: Not Available dmi.board.name: 42872WU dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr8DET64WW(1.34):bd08/31/2012:svnLENOVO:pn42872WU:pvrThinkPadX220:rvnLENOVO:rn42872WU:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 42872WU dmi.product.version: ThinkPad X220 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1314213/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
