@Kai-Heng Feng (kaihengfeng) Based on your suggestion I have tested with the below mainline kernels as well as the current 17.04 kernel. http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.12-rc1/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.12-rc2/ http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.12-rc5/
Short answer: v4.12-rc1 with NOMODESET -> Successfully logged in. v4.12-rc2 with NOMODESET -> Successfully logged in. v4.12-rc5 without NOMODESET-> Successfully logged in. 4.10.0-35-generic with NOMODESET -> Successfully logged in. Though, there have been slight different behaviours observed, which I believe are noteworthy. Long answer: I am using the Dell XPS 15 9560 with a Dell Thunderbolt dock – tb16. The laptop itself is closed and thus only using the external monitor. To turn the laptop on, I use the power button on the docking station. Scenario 1: v4.12-rc1 without NOMODESET -> The external screen eventually shows the login screen background and I can move the mouse. Due to the way the mouse was moving out the display area I then got the impression that it might render the login dialog on the laptop screen instead. This was confirmed by opening my laptop. Scenario 2: v4.12-rc1 with NOMODESET -> The external screen correctly shows the login screen and I can successfully login. Note, kernel v4.12-rc1 and v4.12-rc2 behave identical. Scenario 3: v4.12-rc5 without NOMODESET -> The external screen correctly shows the login screen and I can successfully login. Scenario 4: v4.12-rc5 with NOMODESET -> Eventually shows a black screen. No response to key strokes. Scenario 5: 4.10.0-35-generic without NOMODESET -> The Ubuntu splash screen is displayed (i.e. with the circling progress icon). It never shows the login screen and appears to be stuck in an endless loop. I have observed this for about 10 minute and then turned the computer off. Scenario 6: 4.10.0-35-generic with NOMODESET -> The external screen correctly shows the login screen and I can successfully login. Note, this is the currently latest kernel that ships with Ubuntu 17.04. This is how I currently use Ubuntu 17.04 on Dell XPS 9560. -- 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/1697556 Title: Computer freezes after login - 4.10.0-22-generic Status in linux package in Ubuntu: Confirmed Bug description: I have got a new Ubuntu 17.04 install on a Dell XPS 15 (Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz) that was installed a couple of days ago. Login worked fine too. A couple of days later I installed the suggested kernel update "4.10.0-22-generic". With kernel 4.10.0-22-generic, the computer freezes right after login (i.e. after pressing enter, the background image with the mouse is shown, no responses to any key strokes). Syslog excerpt: Jun 12 22:12:48 computername kernel: [ 47.603358] NMI watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [Xorg.wrap:1672] Jun 12 22:12:48 computername kernel: [ 47.603360] Modules linked in: ccm msr arc4 cmac rfcomm uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core videodev media btusb btrtl bnep hid_multitouch nls_iso8859_1 i2c_designware_platform i2c_designware_core snd_hda_codec_hdmi dell_wmi dell_led dell_smbios snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel dcdbas ath10k_pci snd_hda_codec ath10k_core intel_rapl snd_hda_core ath x86_pkg_temp_thermal snd_hwdep intel_powerclamp mac80211 snd_pcm coretemp snd_seq_midi snd_seq_midi_event cfg80211 snd_rawmidi rtsx_pci_ms kvm_intel memstick kvm irqbypass crct10dif_pclmul joydev crc32_pclmul snd_seq ghash_clmulni_intel snd_seq_device input_leds snd_timer serio_raw snd soundcore idma64 virt_dma mei_me mei shpchp processor_thermal_device intel_soc_dts_iosf intel_lpss_pci intel_pch_thermal Jun 12 22:12:48 computername kernel: [ 47.603422] hci_uart btbcm btqca btintel bluetooth dell_smo8800 intel_hid intel_lpss_acpi sparse_keymap intel_lpss tpm_crb int3403_thermal int3400_thermal acpi_als int340x_thermal_zone acpi_thermal_rel acpi_pad kfifo_buf industrialio mac_hid pcbc aesni_intel crypto_simd glue_helper cryptd aes_x86_64 dm_crypt parport_pc ppdev lp parport ip_tables x_tables autofs4 nouveau rtsx_pci_sdmmc i915 ttm i2c_algo_bit drm_kms_helper syscopyarea mxm_wmi sysfillrect psmouse sysimgblt fb_sys_fops nvme drm nvme_core rtsx_pci ahci libahci i2c_hid hid pinctrl_sunrisepoint video wmi pinctrl_intel fjes Jun 12 22:12:48 computername kernel: [ 47.603453] CPU: 1 PID: 1672 Comm: Xorg.wrap Not tainted 4.10.0-22-generic #24-Ubuntu Jun 12 22:12:48 computername kernel: [ 47.603453] Hardware name: Dell Inc. XPS 15 9560/05FFDN, BIOS 1.3.3 05/08/2017 Note, this problem is observed with kernel 4.10.0-22-generic whereas it's not observed with 4.10.0-21-generic. As I was not able to login to my computer I am writing this bug report while it runs on kernel 4.10.0-21-generic. Therefore the information attached through the "ubuntu-bug linux" command here, are referring to the kernel that is actually working. I decided to nonetheless include that information as it might contain other kernel unrelated information that would help you troubleshooting. Please see attached file "syslog-4.10.0-22-generic-----freeze-after- login.log" for the full syslog. ProblemType: Bug DistroRelease: Ubuntu 17.04 Package: linux-image-4.10.0-21-generic 4.10.0-21.23 ProcVersionSignature: Ubuntu 4.10.0-21.23-generic 4.10.11 Uname: Linux 4.10.0-21-generic x86_64 ApportVersion: 2.20.4-0ubuntu4.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: hkuehn 1796 F.... pulseaudio CurrentDesktop: GNOME Date: Mon Jun 12 23:17:08 2017 EcryptfsInUse: Yes InstallationDate: Installed on 2017-05-30 (13 days ago) InstallationMedia: Ubuntu-GNOME 17.04 "Zesty Zapus" - Release amd64 (20170412) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 138a:0091 Validity Sensors, Inc. Bus 001 Device 002: ID 0cf3:e300 Atheros Communications, Inc. Bus 001 Device 004: ID 0c45:6713 Microdia Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Dell Inc. XPS 15 9560 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.10.0-21-generic.efi.signed root=UUID=e0800d30-3eff-46ac-a6af-38e3bcf99b58 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-4.10.0-21-generic N/A linux-backports-modules-4.10.0-21-generic N/A linux-firmware 1.164.1 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/08/2017 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.3.3 dmi.board.name: 05FFDN dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.3.3:bd05/08/2017:svnDellInc.:pnXPS159560:pvr:rvnDellInc.:rn05FFDN:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.name: XPS 15 9560 dmi.sys.vendor: Dell Inc. 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