我有一个 SSD，启动速度非常快。这是一台刚买了几周的新电脑。现在启动到 ubuntu 20.04 的速度非常慢，恢复后输入登录密码的速度也非常慢。这可能是什么原因造成的？
当我将 20.04 版本安装到我的新电脑上时，除了错误和头痛之外什么也没遇到。
System-Product-Name:~$ journalctl -b
-- Logs begin at Wed 2020-12-16 01:50:13 IST, end at Sat 2021-01-02 14:00:33 IS>
Jan 02 13:39:38 bryan-System-Product-Name kernel: Linux version 5.4.0-58-generi>
Jan 02 13:39:38 bryan-System-Product-Name kernel: Command line: BOOT_IMAGE=/boo>
Jan 02 13:39:38 bryan-System-Product-Name kernel: KERNEL supported cpus:
Jan 02 13:39:38 bryan-System-Product-Name kernel: Intel GenuineIntel
Jan 02 13:39:38 bryan-System-Product-Name kernel: AMD AuthenticAMD
Jan 02 13:39:38 bryan-System-Product-Name kernel: Hygon HygonGenuine
Jan 02 13:39:38 bryan-System-Product-Name kernel: Centaur CentaurHauls
Jan 02 13:39:38 bryan-System-Product-Name kernel: zhaoxin Shanghai
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: Supporting XSAVE fea>
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: Supporting XSAVE fea>
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: Supporting XSAVE fea>
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: Supporting XSAVE fea>
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: xstate_offset[2]: 5>
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: xstate_offset[9]: 8>
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: Enabled xstate featu>
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-provided physical RAM ma>
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000000>
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000000>
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000000>
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000000>
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000000>
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000001>
lines 1-23...skipping...
-- Logs begin at Wed 2020-12-16 01:50:13 IST, end at Sat 2021-01-02 14:00:33 IST. --
Jan 02 13:39:38 bryan-System-Product-Name kernel: Linux version 5.4.0-58-generic (buildd@lcy01-amd64-004) (gcc version 9.3.0 (Ubuntu 9.3.0-17ubuntu1~20.04)) #64-Ubuntu SMP Wed Dec 9 08:16:25 UTC 2020 (Ubuntu >
Jan 02 13:39:38 bryan-System-Product-Name kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-5.4.0-58-generic root=UUID=b24690f7-9b05-4faf-adf1-c10693c02c87 ro quiet splash atkbd.reset i8042.nomux vt.handoff=7
Jan 02 13:39:38 bryan-System-Product-Name kernel: KERNEL supported cpus:
Jan 02 13:39:38 bryan-System-Product-Name kernel: Intel GenuineIntel
Jan 02 13:39:38 bryan-System-Product-Name kernel: AMD AuthenticAMD
Jan 02 13:39:38 bryan-System-Product-Name kernel: Hygon HygonGenuine
Jan 02 13:39:38 bryan-System-Product-Name kernel: Centaur CentaurHauls
Jan 02 13:39:38 bryan-System-Product-Name kernel: zhaoxin Shanghai
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: Supporting XSAVE feature 0x200: 'Protection Keys User registers'
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: xstate_offset[9]: 832, xstate_sizes[9]: 8
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: Enabled xstate features 0x207, context size is 840 bytes, using 'compacted' format.
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-provided physical RAM map:
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x0000000000000000-0x0000000000000fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x0000000000001000-0x000000000008ffff] usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x0000000000090000-0x0000000000090fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x0000000000091000-0x000000000009ffff] usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000000a0000-0x00000000000fffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x0000000000100000-0x0000000009dfefff] usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x0000000009dff000-0x0000000009ffffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x000000000a000000-0x000000000a1fffff] usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x000000000a200000-0x000000000a20dfff] ACPI NVS
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x000000000a20e000-0x000000000affffff] usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x000000000b000000-0x000000000b01ffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x000000000b020000-0x00000000ca684fff] usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000ca685000-0x00000000ca9b1fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000ca9b2000-0x00000000cab01fff] ACPI data
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000cab02000-0x00000000cadf6fff] ACPI NVS
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000cadf7000-0x00000000cbbfefff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000cbbff000-0x00000000ccffffff] usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000cd000000-0x00000000cfffffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000f0000000-0x00000000f7ffffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fd200000-0x00000000fd2fffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fd600000-0x00000000fd7fffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fea00000-0x00000000fea0ffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000feb80000-0x00000000fec01fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fec10000-0x00000000fec10fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fec30000-0x00000000fec30fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fed00000-0x00000000fed00fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fed40000-0x00000000fed44fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fed80000-0x00000000fed8ffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fedc2000-0x00000000fedcffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fedd4000-0x00000000fedd5fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000ff000000-0x00000000ffffffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x0000000100000000-0x000000042f37ffff] usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x000000042f380000-0x000000042fffffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: NX (Execute Disable) protection: active
Jan 02 13:39:38 bryan-System-Product-Name kernel: e820: update [mem 0x90553018-0x90560867] usable ==> usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: e820: update [mem 0x90553018-0x90560867] usable ==> usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: e820: update [mem 0x90533018-0x90552857] usable ==> usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: e820: update [mem 0x90533018-0x90552857] usable ==> usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: extended physical RAM map:
Jan 02 13:39:38 bryan-System-Product-Name kernel: reserve setup_data: [mem 0x0000000000000000-0x0000000000000fff] reserved
lines 1-57
-- Logs begin at Wed 2020-12-16 01:50:13 IST, end at Sat 2021-01-02 14:00:33 IST. --
Jan 02 13:39:38 bryan-System-Product-Name kernel: Linux version 5.4.0-58-generic (buildd@lcy01-amd64-004) (gcc version 9.3.0 (Ubuntu 9.3.0-17ubuntu1~20.04)) #64-Ubuntu SMP Wed Dec 9 08:16:25 UTC 2020 (U>
Jan 02 13:39:38 bryan-System-Product-Name kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-5.4.0-58-generic root=UUID=b24690f7-9b05-4faf-adf1-c10693c02c87 ro quiet splash atkbd.reset i8042.nomux vt.handof>
Jan 02 13:39:38 bryan-System-Product-Name kernel: KERNEL supported cpus:
Jan 02 13:39:38 bryan-System-Product-Name kernel: Intel GenuineIntel
Jan 02 13:39:38 bryan-System-Product-Name kernel: AMD AuthenticAMD
Jan 02 13:39:38 bryan-System-Product-Name kernel: Hygon HygonGenuine
Jan 02 13:39:38 bryan-System-Product-Name kernel: Centaur CentaurHauls
Jan 02 13:39:38 bryan-System-Product-Name kernel: zhaoxin Shanghai
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: Supporting XSAVE feature 0x200: 'Protection Keys User registers'
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: xstate_offset[9]: 832, xstate_sizes[9]: 8
Jan 02 13:39:38 bryan-System-Product-Name kernel: x86/fpu: Enabled xstate features 0x207, context size is 840 bytes, using 'compacted' format.
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-provided physical RAM map:
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x0000000000000000-0x0000000000000fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x0000000000001000-0x000000000008ffff] usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x0000000000090000-0x0000000000090fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x0000000000091000-0x000000000009ffff] usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000000a0000-0x00000000000fffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x0000000000100000-0x0000000009dfefff] usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x0000000009dff000-0x0000000009ffffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x000000000a000000-0x000000000a1fffff] usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x000000000a200000-0x000000000a20dfff] ACPI NVS
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x000000000a20e000-0x000000000affffff] usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x000000000b000000-0x000000000b01ffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x000000000b020000-0x00000000ca684fff] usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000ca685000-0x00000000ca9b1fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000ca9b2000-0x00000000cab01fff] ACPI data
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000cab02000-0x00000000cadf6fff] ACPI NVS
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000cadf7000-0x00000000cbbfefff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000cbbff000-0x00000000ccffffff] usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000cd000000-0x00000000cfffffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000f0000000-0x00000000f7ffffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fd200000-0x00000000fd2fffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fd600000-0x00000000fd7fffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fea00000-0x00000000fea0ffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000feb80000-0x00000000fec01fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fec10000-0x00000000fec10fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fec30000-0x00000000fec30fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fed00000-0x00000000fed00fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fed40000-0x00000000fed44fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fed80000-0x00000000fed8ffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fedc2000-0x00000000fedcffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000fedd4000-0x00000000fedd5fff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x00000000ff000000-0x00000000ffffffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x0000000100000000-0x000000042f37ffff] usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: BIOS-e820: [mem 0x000000042f380000-0x000000042fffffff] reserved
Jan 02 13:39:38 bryan-System-Product-Name kernel: NX (Execute Disable) protection: active
Jan 02 13:39:38 bryan-System-Product-Name kernel: e820: update [mem 0x90553018-0x90560867] usable ==> usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: e820: update [mem 0x90553018-0x90560867] usable ==> usable
Jan 02 13:39:38 bryan-System-Product-Name kernel: e820: update [mem 0x90533018-0x90552857] usable ==> usable