在网上找了好久也没找到解决办法。
当前行为
输入密码后，屏幕变黑，键盘似乎没有反应。
大写锁定对 LED 指示灯没有影响，但ctrl+ alt+F3可以工作但无法输入任何文本。
打开终端后它显示。
"echo 0 > /proc/sys/kernel/hung_task_ti
meout_secs" disables this message.
如果我进入恢复模式，我可以在启动网络并运行正常模式后登录，但屏幕分辨率会较低。
我怀疑是自动更新影响了 ATI Radeon 驱动程序 (Radeon HD 6630M/6650M/6750M/7670M/7690M)，但我不知道如何修复它。我尝试从 GRUB 启动 2 个不同的旧内核，但仍然是同样的行为。
设置
版本
jb@jb-HP-ENVY-14-Notebook-PC:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.2 LTS
Release: 20.04
Codename: focal
硬件
jb@jb-HP-ENVY-14-Notebook-PC:~$ sudo lshw
jb-hp-envy-14-notebook-pc
description: Notebook
product: HP ENVY 14 Notebook PC (QB422PA#AB5)
vendor: Hewlett-Packard
version: 0585200000241A10001630100
serial: CNU1242V9L
width: 64 bits
capabilities: smbios-2.7 dmi-2.7 smp vsyscall32
configuration: boot=normal chassis=notebook family=103C_5335KV G=N L=CON B=HP S=PAV X=MIN sku=QB422PA#AB5 uuid=69FB2CC5-FEB5-7874-48C0-C32491CB0ED3
*-core
description: Motherboard
product: 3385
vendor: Hewlett-Packard
physical id: 0
version: KBC Version 93.0F
serial: PCFYR00QE0V0NK
slot: Base Board Chassis Location
*-firmware
description: BIOS
vendor: Hewlett-Packard
physical id: 0
version: F.04
date: 05/30/2011
size: 1MiB
capacity: 2560KiB
capabilities: pci upgrade shadowing cdboot bootselect edd int13floppynec int13floppytoshiba int13floppy360 int13floppy1200 int13floppy720 int13floppy2880 int9keyboard int10video acpi usb biosbootspecification uefi
*-memory
description: System Memory
physical id: 19
slot: System board or motherboard
size: 8GiB
*-bank:0
description: SODIMM DDR3 Synchronous 1333 MHz (0.8 ns)
product: M471B5273DH0-CH9
vendor: Samsung
physical id: 0
serial: 803034A0
slot: Bottom-Slot 1 (Top)
size: 4GiB
width: 64 bits
clock: 1333MHz (0.8ns)
*-bank:1
description: SODIMM DDR3 Synchronous 1333 MHz (0.8 ns)
product: M471B5273DH0-CH9
vendor: Samsung
physical id: 1
serial: 803034A1
slot: Bottom-Slot 2 (Under)
size: 4GiB
width: 64 bits
clock: 1333MHz (0.8ns)
*-cpu
description: CPU
product: Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz
vendor: Intel Corp.
physical id: 24
bus info: cpu@0
version: Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz
slot: CPU1
size: 1496MHz
capacity: 2900MHz
width: 64 bits
clock: 1333MHz
capabilities: lm 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 ht tm pbe syscall nx rdtscp x86-64 constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer xsave avx lahf_lm epb pti tpr_shadow vnmi flexpriority ept vpid xsaveopt dtherm ida arat pln pts cpufreq
configuration: cores=4 enabledcores=4 threads=8
*-cache:0
description: L1 cache
physical id: 26
slot: L1 Cache
size: 32KiB
capacity: 32KiB
capabilities: synchronous internal write-through instruction
configuration: level=1
*-cache:1
description: L2 cache
physical id: 27
slot: L2 Cache
size: 256KiB
capacity: 256KiB
capabilities: synchronous internal write-through unified
configuration: level=2
*-cache:2
description: L3 cache
physical id: 28
slot: L3 Cache
size: 6MiB
capacity: 6MiB
capabilities: synchronous internal write-through unified
configuration: level=3
*-cache
description: L1 cache
physical id: 25
slot: L1 Cache
size: 32KiB
capacity: 32KiB
capabilities: synchronous internal write-through data
configuration: level=1
*-pci
description: Host bridge
product: 2nd Generation Core Processor Family DRAM Controller
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 09
width: 32 bits
clock: 33MHz
*-pci:0
description: PCI bridge
product: Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port
vendor: Intel Corporation
physical id: 1
bus info: pci@0000:00:01.0
version: 09
width: 32 bits
clock: 33MHz
capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:24 ioport:3000(size=4096) memory:c8700000-c96fffff ioport:c0000000(size=134217728)
*-display UNCLAIMED
description: VGA compatible controller
product: Whistler [Radeon HD 6630M/6650M/6750M/7670M/7690M]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:01:00.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller cap_list
configuration: latency=0
resources: memory:c0000000-c7ffffff memory:c8700000-c871ffff ioport:3000(size=256) memory:c8720000-c873ffff
*-pci:1
description: PCI bridge
product: Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port
vendor: Intel Corporation
physical id: 1.1
bus info: pci@0000:00:01.1
version: 09
width: 32 bits
clock: 33MHz
capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:25
*-pci:2
description: PCI bridge
product: Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port
vendor: Intel Corporation
physical id: 1.2
bus info: pci@0000:00:01.2
version: 09
width: 32 bits
clock: 33MHz
capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:26
*-display UNCLAIMED
description: VGA compatible controller
product: 2nd Generation Core Processor Family Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list
configuration: latency=0
resources: memory:c8000000-c83fffff memory:b0000000-bfffffff ioport:4000(size=64) memory:c0000-dffff
*-communication
description: Communication controller
product: 6 Series/C200 Series Chipset Family MEI Controller #1
vendor: Intel Corporation
physical id: 16
bus info: pci@0000:00:16.0
version: 04
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=mei_me latency=0
resources: irq:39 memory:c9704000-c970400f
*-usb:0
description: USB controller
product: 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2
vendor: Intel Corporation
physical id: 1a
bus info: pci@0000:00:1a.0
version: 05
width: 32 bits
clock: 33MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci-pci latency=0
resources: irq:16 memory:c9709000-c97093ff
*-usbhost
product: EHCI Host Controller
vendor: Linux 5.8.0-50-generic ehci_hcd
physical id: 1
bus info: usb@1
logical name: usb1
version: 5.08
capabilities: usb-2.00
configuration: driver=hub slots=2 speed=480Mbit/s
*-usb
description: USB hub
product: Integrated Rate Matching Hub
vendor: Intel Corp.
physical id: 1
bus info: usb@1:1
version: 0.00
capabilities: usb-2.00
configuration: driver=hub slots=6 speed=480Mbit/s
*-usb
description: Bluetooth wireless interface
product: HP Integrated Module
vendor: Broadcom Corp
physical id: 3
bus info: usb@1:1.3
version: 3.06
capabilities: bluetooth usb-2.00
configuration: driver=btusb speed=12Mbit/s
*-multimedia
description: Audio device
product: 6 Series/C200 Series Chipset Family High Definition Audio Controller
vendor: Intel Corporation
physical id: 1b
bus info: pci@0000:00:1b.0
version: 05
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:42 memory:c9700000-c9703fff
*-pci:3
description: PCI bridge
product: 6 Series/C200 Series Chipset Family PCI Express Root Port 1
vendor: Intel Corporation
physical id: 1c
bus info: pci@0000:00:1c.0
version: b5
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:27 memory:c8600000-c86fffff
*-network
description: Wireless interface
product: Centrino Ultimate-N 6300
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:09:00.0
logical name: wlo1
version: 35
serial: 00:24:d7:b7:e5:60
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.8.0-50-generic firmware=9.221.4.1 build 25532 6000-4.uc ip=192.168.1.144 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:40 memory:c8600000-c8601fff
*-pci:4
description: PCI bridge
product: 6 Series/C200 Series Chipset Family PCI Express Root Port 5
vendor: Intel Corporation
physical id: 1c.4
bus info: pci@0000:00:1c.4
version: b5
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:28 ioport:2000(size=4096) memory:c8500000-c85fffff
*-network
description: Ethernet interface
product: AR8151 v2.0 Gigabit Ethernet
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:0a:00.0
logical name: eno1
version: c0
serial: 64:31:50:a2:87:aa
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=5.8.0-50-generic latency=0 link=no multicast=yes port=twisted pair
resources: irq:41 memory:c8500000-c853ffff ioport:2000(size=128)
*-pci:5
description: PCI bridge
product: 6 Series/C200 Series Chipset Family PCI Express Root Port 8
vendor: Intel Corporation
physical id: 1c.7
bus info: pci@0000:00:1c.7
version: b5
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:29 memory:c8400000-c84fffff
*-usb
description: USB controller
product: uPD720200 USB 3.0 Host Controller
vendor: NEC Corporation
physical id: 0
bus info: pci@0000:0b:00.0
version: 04
width: 64 bits
clock: 33MHz
capabilities: pm msi msix pciexpress xhci bus_master cap_list
configuration: driver=xhci_hcd latency=0
resources: irq:19 memory:c8400000-c8401fff
*-usbhost:0
product: xHCI Host Controller
vendor: Linux 5.8.0-50-generic xhci-hcd
physical id: 0
bus info: usb@3
logical name: usb3
version: 5.08
capabilities: usb-2.00
configuration: driver=hub slots=2 speed=480Mbit/s
*-usbhost:1
product: xHCI Host Controller
vendor: Linux 5.8.0-50-generic xhci-hcd
physical id: 1
bus info: usb@4
logical name: usb4
version: 5.08
capabilities: usb-3.00
configuration: driver=hub slots=2 speed=5000Mbit/s
*-usb:1
description: USB controller
product: 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1
vendor: Intel Corporation
physical id: 1d
bus info: pci@0000:00:1d.0
version: 05
width: 32 bits
clock: 33MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci-pci latency=0
resources: irq:20 memory:c9708000-c97083ff
*-usbhost
product: EHCI Host Controller
vendor: Linux 5.8.0-50-generic ehci_hcd
physical id: 1
bus info: usb@2
logical name: usb2
version: 5.08
capabilities: usb-2.00
configuration: driver=hub slots=2 speed=480Mbit/s
*-usb
description: USB hub
product: Integrated Rate Matching Hub
vendor: Intel Corp.
physical id: 1
bus info: usb@2:1
version: 0.00
capabilities: usb-2.00
configuration: driver=hub slots=6 speed=480Mbit/s
*-usb:0
description: Keyboard
product: USB Receiver
vendor: Logitech
physical id: 1
bus info: usb@2:1.1
version: 12.10
capabilities: usb-2.00
configuration: driver=usbhid maxpower=98mA speed=12Mbit/s
*-usb:1
description: Mass storage device
product: USB2.0-CRW
vendor: Generic
physical id: 3
bus info: usb@2:1.3
version: 38.82
serial: 20090516388200000
capabilities: usb-2.00 scsi
configuration: driver=ums-realtek maxpower=500mA speed=480Mbit/s
*-usb:2
description: Video
product: HP Truevision HD
vendor: QAD5L0SD
physical id: 6
bus info: usb@2:1.6
version: 21.05
capabilities: usb-2.00
configuration: driver=uvcvideo maxpower=250mA speed=480Mbit/s
*-isa
description: ISA bridge
product: HM65 Express Chipset LPC Controller
vendor: Intel Corporation
physical id: 1f
bus info: pci@0000:00:1f.0
version: 05
width: 32 bits
clock: 33MHz
capabilities: isa bus_master cap_list
configuration: driver=lpc_ich latency=0
resources: irq:0
*-sata
description: SATA controller
product: 6 Series/C200 Series Chipset Family 6 port Mobile SATA AHCI Controller
vendor: Intel Corporation
physical id: 1f.2
bus info: pci@0000:00:1f.2
version: 05
width: 32 bits
clock: 66MHz
capabilities: sata msi pm ahci_1.0 bus_master cap_list
configuration: driver=ahci latency=0
resources: irq:38 ioport:4088(size=8) ioport:4094(size=4) ioport:4080(size=8) ioport:4090(size=4) ioport:4060(size=32) memory:c9707000-c97077ff
*-serial
description: SMBus
product: 6 Series/C200 Series Chipset Family SMBus Controller
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 05
width: 64 bits
clock: 33MHz
configuration: driver=i801_smbus latency=0
resources: irq:19 memory:c9705000-c97050ff ioport:4040(size=32)
*-pnp00:00
product: PnP device PNP0c02
physical id: 1
capabilities: pnp
configuration: driver=system
*-pnp00:01
product: PnP device PNP0b00
physical id: 2
capabilities: pnp
configuration: driver=rtc_cmos
*-pnp00:02
product: PnP device INT3f0d
physical id: 3
capabilities: pnp
configuration: driver=system
*-pnp00:03
product: PnP device PNP0303
physical id: 4
capabilities: pnp
configuration: driver=i8042 kbd
*-pnp00:04
product: PnP device SYN1e4f
physical id: 5
capabilities: pnp
configuration: driver=i8042 aux
*-pnp00:05
product: PnP device PNP0c02
physical id: 6
capabilities: pnp
configuration: driver=system
*-pnp00:06
product: PnP device PNP0c01
physical id: 7
capabilities: pnp
configuration: driver=system
*-scsi:0
physical id: 8
logical name: scsi0
capabilities: emulated
*-disk
description: ATA Disk
product: ST9500325AS
physical id: 0.0.0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: BSM1
serial: S2WE2RXL
size: 465GiB (500GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 logicalsectorsize=512 sectorsize=512 signature=a0d7452b
*-volume:0
description: Windows FAT volume
vendor: mkfs.fat
physical id: 1
bus info: scsi@0:0.0.0,1
logical name: /dev/sda1
version: FAT32
serial: cd55-c9e7
size: 510MiB
capacity: 512MiB
capabilities: primary bootable fat initialized
configuration: FATs=2 filesystem=fat
*-volume:1
description: Windows FAT volume
vendor: mkfs.fat
physical id: 2
bus info: scsi@0:0.0.0,2
logical name: /dev/sda2
logical name: /boot/efi
version: FAT32
serial: a5b7-15d6
size: 511MiB
capacity: 513MiB
capabilities: primary fat initialized
configuration: FATs=2 filesystem=fat mount.fstype=vfat mount.options=rw,relatime,fmask=0077,dmask=0077,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro state=mounted
*-volume:2
description: Extended partition
physical id: 3
bus info: scsi@0:0.0.0,3
logical name: /dev/sda3
size: 464GiB
capacity: 464GiB
capabilities: primary extended partitioned partitioned:extended
*-logicalvolume
description: EXT4 volume
vendor: Linux
physical id: 5
logical name: /dev/sda5
logical name: /
version: 1.0
serial: 8e1e6d62-f6d5-4d38-ad1a-11a944a3bce9
size: 464GiB
capacity: 464GiB
capabilities: journaled extended_attributes large_files huge_files dir_nlink recover 64bit extents ext4 ext2 initialized
configuration: created=2020-12-08 13:08:44 filesystem=ext4 lastmountpoint=/ modified=2021-04-24 13:42:44 mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro mounted=2021-04-24 13:42:53 state=mounted
*-scsi:1
physical id: 9
logical name: scsi2
capabilities: emulated
*-cdrom
description: DVD-RAM writer
product: DVDRAM GS30N
vendor: hp
physical id: 0.0.0
bus info: scsi@2:0.0.0
logical name: /dev/cdrom
logical name: /dev/cdrw
logical name: /dev/dvd
logical name: /dev/dvdrw
logical name: /dev/sr0
version: VC03
capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
configuration: ansiversion=5 status=open
*-scsi:2
physical id: a
logical name: scsi6
capabilities: emulated scsi-host
configuration: driver=ums-realtek
*-disk
description: SCSI Disk
product: Multi-Card
vendor: Generic-
physical id: 0.0.0
bus info: scsi@6:0.0.0
logical name: /dev/sdb
version: 1.00
capabilities: removable
configuration: logicalsectorsize=512 sectorsize=512
*-medium
physical id: 0
logical name: /dev/sdb
*-power UNCLAIMED
description: OEM_Define1
product: OEM_Define5
vendor: OEM_Define2
physical id: 1
version: OEM_Define6
serial: OEM_Define3
capacity: 75mWh
编辑：我最终重新安装了 Ubuntu，当我通过软件更新程序更新时出现了类似上述的情况。