Ok, I originally posted on https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1731784
1731784 has been marked as duplicate as this one after I did an "upstream" report (https://bugs.freedesktop.org/show_bug.cgi?id=106422) and Intel engineers investigated to attach it to a "TV-Out" issue with this proposed workaround by the time they (unlikely) find the bug. I can do a new ticket -when I'll have access to the hardware- if this helps tracking, although that would be another duplicate (or do we say "triplicate" in this case!) For the record, the ticket for upstream was done with the drm-debug kernel that I compiled especially to have more messages dumped in dmesg and help Intel engineers. Do you need the "ubuntu-bug linux" with the kernel I compiled especially (4.17) or shall I issue the command on the stock Ubuntu kernel for 18.04 (4.15)? -- 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/1682921 Title: sluggish system, kernel errors on Inspiron 1525 Status in linux package in Ubuntu: Invalid Bug description: Starting in 16.10, this machine started taking forever to boot. Occasionally hangs for a few to tens of seconds. Under 17.04, dmesg is flooding with similar messages: [57593.526006] ------------[ cut here ]------------ [57593.526083] WARNING: CPU: 1 PID: 994 at /build/linux-Fk60NP/linux-4.10.0/drivers/gpu/drm/i915/intel_display.c:13586 intel_atomic_commit_tail+0xfc9/0xfe0 [i915] [57593.526085] encoder detached but still enabled on pipe A. [57593.526086] Modules linked in: gpio_ich dell_wmi sparse_keymap dell_laptop dell_smbios dcdbas dell_smm_hwmon coretemp joydev input_leds snd_hda_codec_idt snd_hda_codec_generic snd_hda_codec_hdmi serio_raw snd_hda_intel snd_hda_codec r852 sm_common arc4 nand snd_hda_core nand_ecc nand_bch bch nand_ids iwl3945 mtd snd_hwdep r592 memstick iwlegacy snd_pcm snd_seq_midi snd_seq_midi_event mac80211 lpc_ich snd_rawmidi cfg80211 snd_seq snd_seq_device snd_timer snd soundcore shpchp mac_hid parport_pc ppdev lp parport ip_tables x_tables autofs4 sdhci_pci i915 firewire_ohci ahci psmouse firewire_core libahci sdhci pata_acpi crc_itu_t i2c_algo_bit drm_kms_helper sky2 syscopyarea fjes sysfillrect sysimgblt fb_sys_fops wmi video drm [57593.526143] CPU: 1 PID: 994 Comm: Xorg Tainted: G W 4.10.0-19-generic #21-Ubuntu [57593.526144] Hardware name: Dell Inc. Inspiron 1525 /0U990C, BIOS A17 10/27/2009 [57593.526146] Call Trace: [57593.526152] dump_stack+0x63/0x81 [57593.526155] __warn+0xcb/0xf0 [57593.526157] warn_slowpath_fmt+0x5f/0x80 [57593.526190] intel_atomic_commit_tail+0xfc9/0xfe0 [i915] [57593.526193] ? __switch_to+0x3d7/0x520 [57593.526196] ? __schedule+0x23b/0x6f0 [57593.526228] intel_atomic_commit+0x3cb/0x4f0 [i915] [57593.526254] ? drm_property_reference_blob+0x12/0x20 [drm] [57593.526269] ? __drm_atomic_helper_crtc_duplicate_state+0x89/0xa0 [drm_kms_helper] [57593.526284] drm_atomic_commit+0x4b/0x50 [drm] [57593.526292] drm_atomic_helper_connector_dpms+0xf8/0x1c0 [drm_kms_helper] [57593.526306] drm_mode_connector_set_obj_prop+0x62/0x70 [drm] [57593.526320] drm_mode_obj_set_property_ioctl+0x11e/0x160 [drm] [57593.526335] drm_mode_connector_property_set_ioctl+0x3f/0x60 [drm] [57593.526347] drm_ioctl+0x21b/0x4c0 [drm] [57593.526362] ? drm_mode_connector_set_obj_prop+0x70/0x70 [drm] [57593.526364] ? new_sync_read+0xd2/0x120 [57593.526367] do_vfs_ioctl+0xa3/0x610 [57593.526370] ? __check_object_size+0x100/0x1d7 [57593.526372] SyS_ioctl+0x79/0x90 [57593.526375] entry_SYSCALL_64_fastpath+0x1e/0xad [57593.526377] RIP: 0033:0x7f047e10f987 [57593.526378] RSP: 002b:00007ffd94d7b8b8 EFLAGS: 00003246 ORIG_RAX: 0000000000000010 [57593.526381] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f047e10f987 [57593.526382] RDX: 00007ffd94d7b8f0 RSI: 00000000c01064ab RDI: 000000000000000e [57593.526384] RBP: 000055ea726a7bf0 R08: 000055ea715184f0 R09: 0000000000000001 [57593.526385] R10: 0000000000000000 R11: 0000000000003246 R12: 0000000000000001 [57593.526386] R13: 00007ffd94d7c500 R14: 0000000000000004 R15: 000055ea728b1840 [57593.526388] ---[ end trace 4e09a51b15857d70 ]--- ProblemType: Bug DistroRelease: Ubuntu 17.04 Package: linux-image-generic 4.10.0.19.21 ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8 Uname: Linux 4.10.0-19-generic x86_64 ApportVersion: 2.20.4-0ubuntu4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: kjotte 1589 F.... pulseaudio CurrentDesktop: XFCE Date: Fri Apr 14 16:02:21 2017 HibernationDevice: RESUME=UUID=78bcd33c-9c41-4aa1-95bb-42bb2f3b502b InstallationDate: Installed on 2013-12-30 (1201 days ago) InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016) MachineType: Dell Inc. Inspiron 1525 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.10.0-19-generic root=UUID=f2c73537-d1d3-4bb8-a337-4d127439e4c9 ro persistent zswap.enabled=1 RelatedPackageVersions: linux-restricted-modules-4.10.0-19-generic N/A linux-backports-modules-4.10.0-19-generic N/A linux-firmware 1.164 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: yes SourcePackage: linux UpgradeStatus: Upgraded to zesty on 2017-04-14 (0 days ago) dmi.bios.date: 10/27/2009 dmi.bios.vendor: Dell Inc. dmi.bios.version: A17 dmi.board.name: 0U990C dmi.board.vendor: Dell Inc. dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA17:bd10/27/2009:svnDellInc.:pnInspiron1525:pvr:rvnDellInc.:rn0U990C:rvr:cvnDellInc.:ct8:cvr: dmi.product.name: Inspiron 1525 dmi.sys.vendor: Dell Inc. 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