Das mit dem systemd Dienst oben könnt ihr vergessen 🙂 Das würde die Konsole viel zu spät starten, wir brauchen die ja viel früher. 😉
nano /etc/default/grubInhalt der Datei
# If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: # info -f grub -n 'Simple configuration' GRUB_DEFAULT=0 GRUB_TIMEOUT=5 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="console=ttyS0,115200n8" GRUB_CMDLINE_LINUX="" # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' #GRUB_GFXMODE=640x480 # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID=true # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_RECOVERY="true" # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1" ## Serial console GRUB_TERMINAL=serial GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"Grub ist der Bootloader, damit wird jetzt sofort beim Start die serielle Konsole geöffnet. Nach dem Ändern der Datei, müssen wir den grub noch aktualisieren.
sudo update-grubDanach kann man neustarten. Nun sieht man nichts mehr auf dem HDMI-Monitor, sondern alles in der seriellen Konsole. Wenn man nach Fehlern sucht einfach unverzichtbar. Auch das Grub Bootmenü taucht nun in der Konsole auf.
Loading Linux 4.19.0-4-amd64 ... Loading initial ramdisk ... [ 0.000000] Linux version 4.19.0-4-amd64 (debian-kernel@lists.debian.org) (g) [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.19.0-4-amd64 root=UUID=8 [ 0.000000] x86/fpu: x87 FPU will use FXSAVE [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000008efff] usable [ 0.000000] BIOS-e820: [mem 0x000000000008f000-0x000000000008ffff] ACPI NVS [ 0.000000] BIOS-e820: [mem 0x0000000000090000-0x000000000009dfff] usable [ 0.000000] BIOS-e820: [mem 0x000000000009e000-0x000000000009ffff] reserved [ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000001effffff] usable [ 0.000000] BIOS-e820: [mem 0x000000001f000000-0x00000000201fffff] reserved [ 0.000000] BIOS-e820: [mem 0x0000000020200000-0x000000007b9b3fff] usable [ 0.000000] BIOS-e820: [mem 0x000000007b9b4000-0x000000007b9e3fff] reserved [ 0.000000] BIOS-e820: [mem 0x000000007b9e4000-0x000000007ba07fff] ACPI data [ 0.000000] BIOS-e820: [mem 0x000000007ba08000-0x000000007baeafff] ACPI NVS [ 0.000000] BIOS-e820: [mem 0x000000007baeb000-0x000000007bd80fff] reserved [ 0.000000] BIOS-e820: [mem 0x000000007bd81000-0x000000007bdeefff] type 20 [ 0.000000] BIOS-e820: [mem 0x000000007bdef000-0x000000007bffffff] usable [ 0.000000] BIOS-e820: [mem 0x00000000e0000000-0x00000000e3ffffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fea00000-0x00000000feafffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fed01000-0x00000000fed01fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fed03000-0x00000000fed03fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fed06000-0x00000000fed06fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fed08000-0x00000000fed09fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fed1c000-0x00000000fed1cfff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fed80000-0x00000000fedbffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fee00000-0x00000000fee00fff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000ffc00000-0x00000000ffffffff] reserved [ 0.000000] NX (Execute Disable) protection: active [ 0.000000] efi: EFI v2.40 by American Megatrends [ 0.000000] efi: ESRT=0x7b9e2000 ACPI=0x7b9eb000 ACPI 2.0=0x7b9eb000 SMB [ 0.000000] secureboot: Secure boot could not be determined (mode 0) [ 0.000000] SMBIOS 3.0.0 present. [ 0.000000] DMI: AAEON MF-001/MF-001, BIOS MFC1AM12 01/30/2018 [ 0.000000] tsc: Detected 1440.000 MHz processor [ 0.000059] last_pfn = 0x7c000 max_arch_pfn = 0x400000000 [ 0.000301] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT [ 0.010131] esrt: ESRT header is not in the memory map. [ 0.011611] RAMDISK: [mem 0x31fd1000-0x34fdffff] [ 0.011631] ACPI: Early table checksum verification disabled [ 0.011640] ACPI: RSDP 0x000000007B9EB000 000024 (v02 ALASKA) [ 0.011653] ACPI: XSDT 0x000000007B9EB0A8 0000CC (v01 ALASKA A M I 010720) [ 0.011670] ACPI: FACP 0x000000007BA012B0 00010C (v05 ALASKA A M I 010720) [ 0.011686] ACPI: DSDT 0x000000007B9EB200 0160AA (v02 ALASKA A M I 010720) [ 0.011698] ACPI: FACS 0x000000007BAD2F80 000040 [ 0.011707] ACPI: APIC 0x000000007BA013C0 000084 (v03 ALASKA A M I 010720) [ 0.011718] ACPI: FPDT 0x000000007BA01448 000044 (v01 ALASKA A M I 010720) [ 0.011728] ACPI: FIDT 0x000000007BA01490 00009C (v01 ALASKA A M I 010720) [ 0.011738] ACPI: MCFG 0x000000007BA01530 00003C (v01 ALASKA A M I 010720) [ 0.011749] ACPI: SSDT 0x000000007BA01570 0041C5 (v01 DptfTb DptfTab 000010) [ 0.011759] ACPI: SSDT 0x000000007BA05738 000654 (v01 CpuDpf CpuDptf 000010) [ 0.011771] ACPI: SSDT 0x000000007BA05D90 000058 (v01 LowPM LowPwrM 000010) [ 0.011782] ACPI: UEFI 0x000000007BA05DE8 000042 (v01 ALASKA A M I 000000) [ 0.011793] ACPI: SSDT 0x000000007BA05E30 000269 (v01 UsbCTb UsbCTab 000010) [ 0.011803] ACPI: HPET 0x000000007BA060A0 000038 (v01 ALASKA A M I 010720) [ 0.011813] ACPI: SSDT 0x000000007BA060D8 000763 (v01 PmRef CpuPm 000030) [ 0.011825] ACPI: SSDT 0x000000007BA06840 000290 (v01 PmRef Cpu0Tst 000030) [ 0.011836] ACPI: SSDT 0x000000007BA06AD0 00017A (v01 PmRef ApTst 000030) [ 0.011846] ACPI: LPIT 0x000000007BA06C50 000104 (v01 ALASKA A M I 000000) [ 0.011856] ACPI: BCFG 0x000000007BA06D58 000139 (v01 INTEL BATTCONF 000000) [ 0.011866] ACPI: PRAM 0x000000007BA06E98 000030 (v01 000000) [ 0.011877] ACPI: BGRT 0x000000007BA06EC8 000038 (v01 ALASKA A M I 010720) [ 0.011887] ACPI: TPM2 0x000000007BA06F00 000034 (v03 Tpm2Tabl 000000) [ 0.011897] ACPI: CSRT 0x000000007BA06F38 00014C (v00 INTEL LANFORDC 000000) [ 0.011909] ACPI: WDAT 0x000000007BA07088 000104 (v01 000000) [ 0.012204] No NUMA configuration foundDie vollständige Ausgabe hier auf pastebin.com
Projekt UART erfolgreich beendet. Manche Dinge lassen einem ja keine Ruhe LOL