我最近更新了 Lubuntu 16.04.03 上的内核硬件，安装了 4.13.0-26。现在重启时，它显示“正在加载初始 ramdisk...”，然后立即重启。
我删除了quiet和splash，并尝试添加nomodeset、debug和earlyprintk=vga（分别和一起添加）。与我在网上找到的其他几个案例不同，我的系统此时不会冻结，而是重新启动。我可以使用 4.10.0-42 成功启动。
我也尝试用 重新安装内核sudo apt install --reinstall linux-image-generic-hwe-16.04，但没有任何变化。
我不确定如何获取更多信息来确定启动失败的根本原因。我在 Dell Optiplex 960 上运行没有特殊驱动程序的 vanilla 安装。没有 EFI，但有 BIOS 启动。
我确实设法获得了串行控制台捕获：
[ 0.000000] random: get_random_bytes called from start_kernel+0x35/0x41c with crng_init=0
[ 0.000000] Linux version 4.13.0-26-generic (buildd@lgw01-amd64-036) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.5)) #29~16.04.2-Ubuntu SMP Tue Jan 9 21:38:24 UTC 2018 (Ubuntu 4.13.0-26.29~16.04.2-generic 4.13.13)
[ 0.000000] KERNEL supported cpus:
[ 0.000000] Intel GenuineIntel
[ 0.000000] AMD AuthenticAMD
[ 0.000000] NSC Geode by NSC
[ 0.000000] Cyrix CyrixInstead
[ 0.000000] Centaur CentaurHauls
[ 0.000000] Transmeta GenuineTMx86
[ 0.000000] Transmeta TransmetaCPU
[ 0.000000] UMC UMC UMC UMC
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
[ 0.000000] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
[ 0.000000] x86/fpu: Enabled xstate features 0x3, context size is 576 bytes, using 'standard' format.
[ 0.000000] e820: BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009ebff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000bd9ffbff] usable
[ 0.000000] BIOS-e820: [mem 0x00000000bd9ffc00-0x00000000bda53bff] ACPI NVS
[ 0.000000] BIOS-e820: [mem 0x00000000bda53c00-0x00000000bda55bff] ACPI data
[ 0.000000] BIOS-e820: [mem 0x00000000bda55c00-0x00000000bfffffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000e0000000-0x00000000efffffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fec00000-0x00000000fed003ff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fed20000-0x00000000fed9ffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000fee00000-0x00000000feefffff] reserved
[ 0.000000] BIOS-e820: [mem 0x00000000ffb00000-0x00000000ffffffff] reserved
[ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x0000000177ffffff] usable
[ 0.000000] console [earlyser0] enabled
[ 0.000000] NX (Execute Disable) protection: active
[ 0.000000] random: fast init done
[ 0.000000] SMBIOS 2.5 present.
[ 0.000000] DMI: Dell Inc. OptiPlex 960 /0Y958C, BIOS A03 02/17/2009
[ 0.000000] tsc: Fast TSC calibration using PIT
[ 0.000000] e820: last_pfn = 0x178000 max_arch_pfn = 0x1000000
[ 0.000000] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WC UC- WT
[ 0.000000] found SMP MP-table at [mem 0x000fe710-0x000fe71f] mapped at [c00fe710]
[ 0.000000] Scanning 1 areas for low memory corruption
[ 0.000000] RAMDISK: [mem 0x32512000-0x35280fff]
[ 0.000000] ACPI: Early table checksum verification disabled
[ 0.000000] ACPI: RSDP 0x00000000000FEC00 000024 (v02 DELL )
[ 0.000000] ACPI: XSDT 0x00000000000FC7CD 00008C (v01 DELL B10K 00000015 ASL 00000061)
[ 0.000000] ACPI: FACP 0x00000000000FC8FD 0000F4 (v03 DELL B10K 00000015 ASL 00000061)
[ 0.000000] ACPI BIOS Warning (bug): 32/64X length mismatch in FADT/Gpe0Block: 128/64 (20170531/tbfadt-603)
[ 0.000000] ACPI: DSDT 0x00000000FFE9CFCA 00545E (v01 DELL dt_ex 00001000 INTL 20050624)
[ 0.000000] ACPI: FACS 0x00000000BD9FFC00 000040
[ 0.000000] ACPI: FACS 0x00000000BD9FFC00 000040
[ 0.000000] ACPI: SSDT 0x00000000FFEA2547 0000AA (v01 DELL st_ex 00001000 INTL 20050624)
[ 0.000000] ACPI: APIC 0x00000000000FC9F1 000092 (v01 DELL B10K 00000015 ASL 00000061)
[ 0.000000] ACPI: BOOT 0x00000000000FCA83 000028 (v01 DELL B10K 00000015 ASL 00000061)
[ 0.000000] ACPI: ASF! 0x00000000000FCAAB 000096 (v32 DELL B10K 00000015 ASL 00000061)
[ 0.000000] ACPI: MCFG 0x00000000000FCB41 00003E (v01 DELL B10K 00000015 ASL 00000061)
[ 0.000000] ACPI: HPET 0x00000000000FCB7F 000038 (v01 DELL B10K 00000015 ASL 00000061)
[ 0.000000] ACPI: TCPA 0x00000000000FCDDB 000032 (v01 DELL B10K 00000015 ASL 00000061)
[ 0.000000] ACPI: DMAR 0x00000000000FCE0D 000120 (v01 DELL B10K 00000015 ASL 00000061)
[ 0.000000] ACPI: SLIC 0x00000000000FCBB7 000176 (v01 DELL B10K 00000015 ASL 00000061)
[ 0.000000] ACPI: SSDT 0x00000000BD9FFC40 0001F9 (v01 DpgPmm Cpu0Ist 00000011 INTL 20050624)
[ 0.000000] ACPI: SSDT 0x00000000BDA00049 0001F9 (v01 DpgPmm Cpu1Ist 00000011 INTL 20050624)
[ 0.000000] ACPI: SSDT 0x00000000BDA00452 000190 (v01 DpgPmm CpuPm 00000010 INTL 20050624)
[ 0.000000] 5126MB HIGHMEM available.
[ 0.000000] 889MB LOWMEM available.
[ 0.000000] mapped low ram: 0 - 379fe000
[ 0.000000] low ram: 0 - 379fe000
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.000000] Normal [mem 0x0000000001000000-0x00000000379fdfff]
[ 0.000000] HighMem [mem 0x00000000379fe000-0x0000000177ffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000001000-0x000000000009dfff]
[ 0.000000] node 0: [mem 0x0000000000100000-0x00000000bd9fefff]
[ 0.000000] node 0: [mem 0x0000000100000000-0x0000000177ffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000001000-0x0000000177ffffff]
[ 0.000000] Using APIC driver default
[ 0.000000] Reserving Intel graphics memory at 0x00000000be000000-0x00000000bfffffff
[ 0.000000] ACPI: PM-Timer IO Port: 0x808
[ 0.000000] ACPI: LAPIC_NMI (acpi_id[0xff] high level lint[0x1])
[ 0.000000] IOAPIC[0]: apic_id 8, version 32, address 0xfec00000, GSI 0-23
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.000000] Using ACPI (MADT) for SMP configuration information
[ 0.000000] ACPI: HPET id: 0x8086a701 base: 0xfed00000
[ 0.000000] smpboot: Allowing 8 CPUs, 6 hotplug CPUs
[ 0.000000] PM: Registered nosave memory: [mem 0x00000000-0x00000fff]
[ 0.000000] PM: Registered nosave memory: [mem 0x0009e000-0x000effff]
[ 0.000000] PM: Registered nosave memory: [mem 0x000f0000-0x000fffff]
[ 0.000000] e820: [mem 0xc0000000-0xdfffffff] available for PCI devices
[ 0.000000] Booting paravirtualized kernel on bare hardware
[ 0.000000] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645519600211568 ns
[ 0.000000] setup_percpu: NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:8 nr_node_ids:1
[ 0.000000] percpu: Embedded 31 pages/cpu @f5603000 s94284 r0 d32692 u126976
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 1265899
[ 0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.13.0-26-generic root=UUID=f74edde2-ad94-4ea1-b340-f9c8e9c728e5 ro debug loglevel=7 earlyprintk=serial,ttyS0,115200,keep intel_iommu=off panic=30 console=ttyS0,115200
[ 0.000000] DMAR: IOMMU disabled
[ 0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
[ 0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
[ 0.000000] microcode: microcode updated early to revision 0xa0b, date = 2010-09-28
[ 0.000000] Initializing CPU#0
[ 0.000000] Initializing HighMem for node 0 (000379fe:00178000)
[ 0.000000] Initializing Movable for node 0 (00000000:00000000)
[ 0.000000] Memory: 4957884K/5072496K available (8497K kernel code, 876K rwdata, 3332K rodata, 1092K init, 852K bss, 114612K reserved, 0K cma-reserved, 4161540K highmem)
[ 0.000000] virtual kernel memory layout:
[ 0.000000] fixmap : 0xfff14000 - 0xfffff000 ( 940 kB)
[ 0.000000] cpu_entry : 0xffc00000 - 0xffd39000 (1252 kB)
[ 0.000000] pkmap : 0xffa00000 - 0xffc00000 (2048 kB)
[ 0.000000] vmalloc : 0xf81fe000 - 0xff9fe000 ( 120 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xf79fe000 ( 889 MB)
[ 0.000000] .init : 0xc6c7e000 - 0xc6d8f000 (1092 kB)
[ 0.000000] .data : 0xc684c7c6 - 0xc6c6b2c0 (4218 kB)
[ 0.000000] .text : 0xc6000000 - 0xc684c7c6 (8497 kB)
关于调试有什么提示或者可能存在什么问题？
答案1
这似乎是 ACPI 中的一个问题。来自 Ubuntu 内核错误跟踪器：
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1742675
以及内核主线（上面提到）：
https://bugzilla.kernel.org/show_bug.cgi?id=198143
添加acpi=off内核命令行可以修复该问题。