Entering wrong password once on login causes startup to hang on purple screen

[Fares Alaboud]

Hi folks,

Running Ubuntu 18.04 LTS (dual boot with Windows 10 Pro) on Dell XPS 15 9570, lshw below.

Steps to reproduce:

1. Turn on computer
2. Select Ubuntu from GRUB menu
3. Wait for login screen
4. User list appears, click on user
5. Enter incorrect password
6. Wait for prompt to enter password again
7. Enter correct password

Now screen will hang.

lshw:

xps15
    description: Notebook
    product: XPS 15 9575 (080D)
    vendor: Dell Inc.
    serial: FZVMTN2
    width: 64 bits
    capabilities: smbios-3.1 dmi-3.1 smp vsyscall32
    configuration: boot=normal chassis=notebook family=XPS sku=080D uuid=44454C4C-5A00-1056-804D-C6C04F544E32
  *-core
       description: Motherboard
       product: 0C32VW
       vendor: Dell Inc.
       physical id: 0
       version: A00
       serial: /FZVMTN2/CNCMK0085I0053/
     *-firmware
          description: BIOS
          vendor: Dell Inc.
          physical id: 0
          version: 1.0.7
          date: 03/16/2018
          size: 64KiB
          capacity: 15MiB
          capabilities: pci pnp upgrade shadowing cdboot bootselect edd int13floppynec int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer acpi usb smartbattery biosbootspecification netboot uefi
     *-memory
          description: System Memory
          physical id: 3c
          slot: System board or motherboard
          size: 16GiB
        *-bank
             description: Row of chips DDR4 Synchronous Unbuffered (Unregistered) 2400 MHz (0.4 ns)
             product: HMAA51S6AMR6N-UH
             vendor: SK Hynix
             physical id: 0
             slot: Motherboard
             size: 16GiB
             width: 64 bits
             clock: 2400MHz (0.4ns)
     *-cache:0
          description: L1 cache
          physical id: 3f
          slot: L1 Cache
          size: 256KiB
          capacity: 256KiB
          capabilities: synchronous internal write-back unified
          configuration: level=1
     *-cache:1
          description: L2 cache
          physical id: 40
          slot: L2 Cache
          size: 1MiB
          capacity: 1MiB
          capabilities: synchronous internal write-back unified
          configuration: level=2
     *-cache:2
          description: L3 cache
          physical id: 41
          slot: L3 Cache
          size: 8MiB
          capacity: 8MiB
          capabilities: synchronous internal write-back unified
          configuration: level=3
     *-cpu
          description: CPU
          product: Intel(R) Core(TM) i7-8705G CPU @ 3.10GHz
          vendor: Intel Corp.
          physical id: 42
          bus info: cpu@0
          version: Intel(R) Core(TM) i7-8705G CPU @ 3.10GHz
          serial: To Be Filled By O.E.M.
          slot: U3E1
          size: 3885MHz
          capacity: 4100MHz
          width: 64 bits
          clock: 100MHz
          capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb invpcid_single pti tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid mpx rdseed adx smap clflushopt intel_pt xsaveopt xsavec xgetbv1 xsaves ibpb ibrs stibp dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp cpufreq
          configuration: cores=4 enabledcores=4 threads=8
     *-pci
          description: Host bridge
          product: Intel Corporation
          vendor: Intel Corporation
          physical id: 100
          bus info: pci@0000:00:00.0
          version: 05
          width: 32 bits
          clock: 33MHz
        *-pci:0
             description: PCI bridge
             product: Skylake PCIe Controller (x16)
             vendor: Intel Corporation
             physical id: 1
             bus info: pci@0000:00:01.0
             version: 05
             width: 32 bits
             clock: 33MHz
             capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:16 ioport:e000(size=4096) memory:ecd00000-ecdfffff ioport:a0000000(size=270532608)
           *-display UNCLAIMED
                description: Display controller
                product: Advanced Micro Devices, Inc. [AMD/ATI]
                vendor: Advanced Micro Devices, Inc. [AMD/ATI]
                physical id: 0
                bus info: pci@0000:01:00.0
                version: c0
                width: 64 bits
                clock: 33MHz
                capabilities: pm pciexpress msi cap_list
                configuration: latency=0
                resources: memory:a0000000-afffffff memory:b0000000-b01fffff ioport:e000(size=256) memory:ecd00000-ecd3ffff memory:ecd40000-ecd5ffff
        *-display
             description: VGA compatible controller
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 2
             bus info: pci@0000:00:02.0
             version: 04
             width: 64 bits
             clock: 33MHz
             capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
             configuration: driver=i915 latency=0
             resources: irq:125 memory:eb000000-ebffffff memory:90000000-9fffffff ioport:f000(size=64) memory:c0000-dffff
        *-generic:0
             description: Signal processing controller
             product: Skylake Processor Thermal Subsystem
             vendor: Intel Corporation
             physical id: 4
             bus info: pci@0000:00:04.0
             version: 05
             width: 64 bits
             clock: 33MHz
             capabilities: msi pm cap_list
             configuration: driver=proc_thermal latency=0
             resources: iomemory:2f0-2ef irq:16 memory:2ffff10000-2ffff17fff
        *-generic:1 UNCLAIMED
             description: Non-VGA unclassified device
             product: Sunrise Point-H Integrated Sensor Hub
             vendor: Intel Corporation
             physical id: 13
             bus info: pci@0000:00:13.0
             version: 31
             width: 64 bits
             clock: 33MHz
             capabilities: pm cap_list
             configuration: latency=0
             resources: iomemory:2f0-2ef memory:2ffff1c000-2ffff1cfff
        *-usb
             description: USB controller
             product: Sunrise Point-H USB 3.0 xHCI Controller
             vendor: Intel Corporation
             physical id: 14
             bus info: pci@0000:00:14.0
             version: 31
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi xhci bus_master cap_list
             configuration: driver=xhci_hcd latency=0
             resources: irq:122 memory:ece00000-ece0ffff
           *-usbhost:0
                product: xHCI Host Controller
                vendor: Linux 4.15.0-22-generic xhci-hcd
                physical id: 0
                bus info: usb@1
                logical name: usb1
                version: 4.15
                capabilities: usb-2.00
                configuration: driver=hub slots=16 speed=480Mbit/s
              *-usb:0
                   description: Video
                   product: Integrated_Webcam_HD
                   vendor: CN0FFMHCLOG0083GB8GVA01
                   physical id: 1
                   bus info: usb@1:1
                   version: 72.79
                   serial: 200901010001
                   capabilities: usb-2.01
                   configuration: driver=uvcvideo maxpower=500mA speed=480Mbit/s
              *-usb:1
                   description: Bluetooth wireless interface
                   vendor: Foxconn / Hon Hai
                   physical id: 6
                   bus info: usb@1:6
                   version: 0.01
                   capabilities: bluetooth usb-1.10
                   configuration: driver=btusb maxpower=100mA speed=12Mbit/s
              *-usb:2
                   description: Modem
                   product: Goodix Fingerprint Device
                   vendor: HTMicroelectronics
                   physical id: a
                   bus info: usb@1:a
                   version: 1.00
                   serial: HTK32
                   capabilities: usb-2.00 atcommands
                   configuration: driver=cdc_acm maxpower=100mA speed=12Mbit/s
           *-usbhost:1
                product: xHCI Host Controller
                vendor: Linux 4.15.0-22-generic xhci-hcd
                physical id: 1
                bus info: usb@2
                logical name: usb2
                version: 4.15
                capabilities: usb-3.00
                configuration: driver=hub slots=8 speed=5000Mbit/s
        *-generic:2
             description: Signal processing controller
             product: Sunrise Point-H Thermal subsystem
             vendor: Intel Corporation
             physical id: 14.2
             bus info: pci@0000:00:14.2
             version: 31
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi cap_list
             configuration: driver=intel_pch_thermal latency=0
             resources: irq:18 memory:ece18000-ece18fff
        *-generic:3
             description: Signal processing controller
             product: Sunrise Point-H Serial IO I2C Controller #0
             vendor: Intel Corporation
             physical id: 15
             bus info: pci@0000:00:15.0
             version: 31
             width: 64 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list
             configuration: driver=intel-lpss latency=0
             resources: iomemory:2f0-2ef irq:16 memory:2ffff1b000-2ffff1bfff
        *-generic:4
             description: Signal processing controller
             product: Sunrise Point-H Serial IO I2C Controller #1
             vendor: Intel Corporation
             physical id: 15.1
             bus info: pci@0000:00:15.1
             version: 31
             width: 64 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list
             configuration: driver=intel-lpss latency=0
             resources: iomemory:2f0-2ef irq:17 memory:2ffff1a000-2ffff1afff
        *-communication
             description: Communication controller
             product: Sunrise Point-H CSME HECI #1
             vendor: Intel Corporation
             physical id: 16
             bus info: pci@0000:00:16.0
             version: 31
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list
             configuration: driver=mei_me latency=0
             resources: iomemory:2f0-2ef irq:133 memory:2ffff19000-2ffff19fff
        *-pci:1
             description: PCI bridge
             product: Sunrise Point-H PCI Express Root Port #1
             vendor: Intel Corporation
             physical id: 1c
             bus info: pci@0000:00:1c.0
             version: f1
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:16 memory:ec000000-ec1fffff
           *-network
                description: Wireless interface
                product: QCA6174 802.11ac Wireless Network Adapter
                vendor: Qualcomm Atheros
                physical id: 0
                bus info: pci@0000:02:00.0
                logical name: wlp2s0
                version: 32
                serial: 9c:b6:d0:8c:db:cd
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
                configuration: broadcast=yes driver=ath10k_pci driverversion=4.15.0-22-generic firmware=WLAN.RM.4.4.1-00079-QCARMSWPZ-1 ip=192.168.0.29 latency=0 link=yes multicast=yes wireless=IEEE 802.11
                resources: irq:134 memory:ec000000-ec1fffff
        *-pci:2
             description: PCI bridge
             product: Sunrise Point-H PCI Express Root Port #5
             vendor: Intel Corporation
             physical id: 1c.4
             bus info: pci@0000:00:1c.4
             version: f1
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:16 ioport:d000(size=4096) memory:ec200000-ecbfffff ioport:2ffa100000(size=10485760)
           *-generic
                description: Unassigned class
                product: RTS525A PCI Express Card Reader
                vendor: Realtek Semiconductor Co., Ltd.
                physical id: 0
                bus info: pci@0000:03:00.0
                version: 01
                width: 32 bits
                clock: 33MHz
                capabilities: pm msi pciexpress bus_master cap_list
                configuration: driver=rtsx_pci latency=0
                resources: irq:123 memory:ec200000-ec200fff
        *-pci:3
             description: PCI bridge
             product: Sunrise Point-H PCI Express Root Port #9
             vendor: Intel Corporation
             physical id: 1d
             bus info: pci@0000:00:1d.0
             version: f1
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:16 ioport:2000(size=4096) memory:bc000000-ea0fffff ioport:2fb0000000(size=1241513984)
        *-pci:4
             description: PCI bridge
             product: Sunrise Point-H PCI Express Root Port #13
             vendor: Intel Corporation
             physical id: 1d.4
             bus info: pci@0000:00:1d.4
             version: f1
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:16 memory:ecc00000-eccfffff
           *-storage
                description: Non-Volatile memory controller
                physical id: 0
                bus info: pci@0000:6f:00.0
                version: 00
                width: 64 bits
                clock: 33MHz
                capabilities: storage pm pciexpress msix nvm_express bus_master cap_list
                configuration: driver=nvme latency=0
                resources: irq:16 memory:ecc00000-ecc03fff
        *-isa
             description: ISA bridge
             product: Sunrise Point-H LPC Controller
             vendor: Intel Corporation
             physical id: 1f
             bus info: pci@0000:00:1f.0
             version: 31
             width: 32 bits
             clock: 33MHz
             capabilities: isa bus_master
             configuration: latency=0
        *-memory UNCLAIMED
             description: Memory controller
             product: Sunrise Point-H PMC
             vendor: Intel Corporation
             physical id: 1f.2
             bus info: pci@0000:00:1f.2
             version: 31
             width: 32 bits
             clock: 33MHz (30.3ns)
             configuration: latency=0
             resources: memory:ece14000-ece17fff
        *-multimedia
             description: Audio device
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 1f.3
             bus info: pci@0000:00:1f.3
             version: 31
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi bus_master cap_list
             configuration: driver=snd_hda_intel latency=32
             resources: iomemory:2f0-2ef irq:135 memory:ece10000-ece13fff memory:2ffff00000-2ffff0ffff
        *-serial UNCLAIMED
             description: SMBus
             product: Sunrise Point-H SMBus
             vendor: Intel Corporation
             physical id: 1f.4
             bus info: pci@0000:00:1f.4
             version: 31
             width: 64 bits
             clock: 33MHz
             configuration: latency=0
             resources: iomemory:2f0-2ef memory:2ffff18000-2ffff180ff ioport:f040(size=32)
  *-battery
       product: DELL TMFYT83
       vendor: BYD
       physical id: 1
       version: 03/30/2018
       serial: 02DD
       slot: Sys. Battery Bay
       capacity: 75000mWh
       configuration: voltage=11.4V

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1773541/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1766137, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.