This issue could not reproduce with an AOC E2460SW Widescreen (24" 1920 x 1080 16:9).
I tried to reproduce by the following steps: 1. Enabled the proposed pocket, and updated the system via GUI updater. 2. After updating the system, reboot. 3. Plug-in the aforementioned monitor in the HDMI jack of the XPS15. 4. Check dmesg and /var/log/syslog. The panic message could not be found in both of them. The screen of external HDMI monitor and the internal monitor looks good as well. 5. Suspend the system by the desktop indicator. 6. After the system resumed, repeated the step3. I got the same result as the step4. -- 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/1658999 Title: [Xenial Regression] Kernel panics on HDMI in Xenial Status in linux package in Ubuntu: Triaged Bug description: sabdfl is on a Dell XPS 15 and seeing kernel panics on HDMI connect with a wide range of displays. He's running 4.4.0-62.83 and notes this is definitely a regression as it was working previously. Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.995791] ------------[ cut here ]------------ Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.995842] WARNING: CPU: 4 PID: 2548 at /build/linux-W6HB68/linux-4.4.0/ubuntu/i915/intel_pm.c:3675 skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo]() Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.995846] WARN_ON(!wm_changed) Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.995849] Modules linked in: xt_REDIRECT nf_nat_redirect xt_hl xt_conntrack xt_addrtype overlay aufs rfcomm xt_CHECKSUM iptable_mangle xt_tcpudp ipt_MASQUERADE nf_nat_masquerade_ipv4 xt_comment iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack bridge stp llc bnep binfmt_misc snd_hda_codec_hdmi dell_led snd_hda_codec_realtek snd_hda_codec_generic zfs(PO) zunicode(PO) zcommon(PO) znvpair(PO) spl(O) zavl(PO) nls_iso8859_1 dell_wmi dell_laptop dcdbas snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm brcmfmac snd_seq_midi brcmutil snd_seq_midi_event rtsx_pci_ms cfg80211 memstick intel_rapl x86_pkg_temp_thermal intel_powerclamp snd_rawmidi coretemp crct10dif_pclmul crc32_pclmul snd_seq ghash_clmulni_intel aesni_intel uvcvideo aes_x86_64 videobuf2_vmalloc btusb cdc_ether lrw videobuf2_memops snd_seq_device gf128mul usbnet videobuf2_v4l2 btrtl glue_helper snd_timer ablk_helper videobuf2_core cryptd r8152 v4l2_common hid_multitouch mii videodev snd media joydev input_leds serio_raw soundcore idma64 virt_dma mei_me mei processor_thermal_device shpchp intel_lpss_pci intel_soc_dts_iosf intel_lpss_acpi intel_lpss hci_uart btbcm btqca btintel int3403_thermal bluetooth dell_smo8800 intel_hid int3400_thermal mac_hid acpi_thermal_rel sparse_keymap int3402_thermal int340x_thermal_zone acpi_pad acpi_als kfifo_buf industrialio kvm_intel kvm irqbypass iptable_filter ip_tables ip6table_filter ip6_tables x_tables parport_pc ppdev lp parport autofs4 usbhid rtsx_pci_sdmmc nouveau i915_bpo mxm_wmi intel_ips ttm i2c_algo_bit drm_kms_helper psmouse syscopyarea sysfillrect sysimgblt fb_sys_fops ahci nvme rtsx_pci drm libahci i2c_hid hid wmi pinctrl_sunrisepoint video pinctrl_intel fjes Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996021] CPU: 4 PID: 2548 Comm: Xorg Tainted: P O 4.4.0-62-generic #83-Ubuntu Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996024] Hardware name: Dell Inc. XPS 15 9550/0N7TVV, BIOS 01.02.00 04/07/2016 Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996027] 0000000000000286 000000005b61ce69 ffff880880293920 ffffffff813f7c63 Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996033] ffff880880293968 ffffffffc02be9a0 ffff880880293958 ffffffff810812d2 Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996037] ffff88089255f000 ffff88089160a148 ffff88089255e000 ffff880892644b78 Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996042] Call Trace: Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996051] [<ffffffff813f7c63>] dump_stack+0x63/0x90 Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996059] [<ffffffff810812d2>] warn_slowpath_common+0x82/0xc0 Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996064] [<ffffffff8108136c>] warn_slowpath_fmt+0x5c/0x80 Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996101] [<ffffffffc01dffec>] skl_update_other_pipe_wm+0x16c/0x180 [i915_bpo] Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996136] [<ffffffffc01e0185>] skl_update_wm+0x185/0x610 [i915_bpo] Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996190] [<ffffffffc02713af>] ? intel_ddi_enable_transcoder_func+0x17f/0x260 [i915_bpo] Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996225] [<ffffffffc01e3f0e>] intel_update_watermarks+0x1e/0x30 [i915_bpo] Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996276] [<ffffffffc0253681>] haswell_crtc_enable+0x761/0x8e0 [i915_bpo] Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996327] [<ffffffffc024f586>] intel_atomic_commit+0x5d6/0x14a0 [i915_bpo] Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996366] [<ffffffffc00d3bde>] ? drm_atomic_check_only+0x18e/0x590 [drm] Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996397] [<ffffffffc00d4017>] drm_atomic_commit+0x37/0x60 [drm] Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996415] [<ffffffffc017fdc6>] drm_atomic_helper_set_config+0x76/0xb0 [drm_kms_helper] Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996443] [<ffffffffc00c2e42>] drm_mode_set_config_internal+0x62/0x100 [drm] Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996472] [<ffffffffc00c749c>] drm_mode_setcrtc+0x3cc/0x4f0 [drm] Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996493] [<ffffffffc00b8752>] drm_ioctl+0x152/0x540 [drm] Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996519] [<ffffffffc00c70d0>] ? drm_mode_setplane+0x1b0/0x1b0 [drm] Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996527] [<ffffffff812227af>] do_vfs_ioctl+0x29f/0x490 Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996533] [<ffffffff8108e561>] ? __set_task_blocked+0x41/0xa0 Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996539] [<ffffffff81090ef6>] ? __set_current_blocked+0x36/0x60 Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996543] [<ffffffff81222a19>] SyS_ioctl+0x79/0x90 Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996548] [<ffffffff810911ae>] ? SyS_rt_sigprocmask+0x8e/0xc0 Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996555] [<ffffffff818385f2>] entry_SYSCALL_64_fastpath+0x16/0x71 Jan 24 08:32:31 mark-XPS-15-9550 kernel: [ 489.996559] ---[ end trace 62a7d2128b4c1405 ]--- To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1658999/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
