Same behaviour here. Booting ends in initramfs rescue shell. Keyboard inputs are not possible.
The root directory uses btrfs as filesystem. I have compared the contents of - /boot/initrd.img-4.18.0-3-amd64 (working) - /boot/initrd.img-4.19.0-1-amd64 (failed) with the folling results: The scripts under /scripts are identical. The initrd.img-4.19.0-1-amd64 contains a additional hid-nti.ko driver and the files - /bin/ntfs-3g - /bin/udevadm - /etc/udev.conf - /etc/ld.so.cache - /usr/lib/modules/4.18.0-3-amd64 - /usr/lib/modules/4.19.0-1-amd64 - /usr/lib/systemd-udevd - /usr/lib/udev/rules.d/60-persistent-storage.rules - /usr/lib/udev/rules.d/61-seat.rules - /usr/lib/udev/rules.d/61-seat.rules - /usr/lib/udev/ata_id - /usr/lib/udev/scsi_id - /usr/lib/x86_64-linux-gnu/libdevmapper.so.1.02.1 - /usr/lib/x86_64-linux-gnu/libgcc_s.so.1 - /usr/lib/x86_64-linux-gnu/libntfs-3g.so.88 (.883) - /usr/lib/x86_64-linux-gnu/libntfs-3g.so.88.0.0 (.883.0.0) - /usr/lib/x86_64-linux-gnu/libudev.so.1 - /usr/lib/x86_64-linux-gnu/libudev.so.1.6.11 (1.6.12) differ. The kernel was updated to linux-image-4.19.0-1-amd64 on 2018-12-28 and runs until today with these linux-image. Therefore I think, it is not a kernel problem. The following packages were updated between the last successfull and the failed initrimfs generation: - initramfs-tools:all - libvlc-bin:amd64 - libntfs-3g88:amd64 - libc-bin:amd64 - chromium-common:amd64 - chromium-sandbox:amd64 - mime-support:all - chromium:amd64 - man-db:amd64 - hicolor-icon-theme:all - sysvinit-utils:amd64 - libsystemd0:amd64 - libudev1:amd64 - systemd:amd64 - kget:amd64 - libnss-systemd:amd64 - kdeconnect:amd64 - exim4-config:all - mime-support:all - install-info:amd64 - systemd-sysv:amd64 - fonts-hack:all - exim4-base:amd64 - libgirepository-1.0-1:amd64 - librhash0:amd64 - libntlm0:amd64 - gir1.2-glib-2.0:amd64 - libc-bin:amd64 - udev:amd64 - libsuitesparseconfig5:amd64 - qttranslations5-l10n:all - guile-2.0-libs:amd64 - systemd:amd64 - libsqlite3-0:amd64 - libcolamd2:amd64 - libccolamd2:amd64 - liborcus-0.14-0:amd64 - man-db:amd64 - shared-mime-info:amd64 - emacs-common:all - exim4-daemon-light:amd64 - dbus:amd64 - fonts-opensymbol:all - uno-libs3:amd64 - hicolor-icon-theme:all - libkyotocabinet16v5:amd64 - ure:amd64 - liborcus-0.13-0:amd64 - libkf5konq6:amd64 - fontconfig:amd64 - mailutils-common:all - libgsasl7:amd64 - libmailutils5:amd64 - libpam-systemd:amd64 - emacs-bin-common:amd64 - gir1.2-freedesktop:amd64 - libcamd2:amd64 - mailutils:amd64 - sqlite3:amd64 - libamd2:amd64 - emacs-el:all - konqueror:amd64 - emacs-gtk:amd64 - emacs:all - libcholmod3:amd64 - konq-plugins:amd64 - libumfpack5:amd64 - libreoffice-style-tango:all - libreoffice-style-colibre:all - libreoffice-common:all - libreoffice-core:amd64 - python3-uno:amd64 - libreoffice-base-drivers:amd64 - libreoffice-style-breeze:all - libreoffice-l10n-de:all - libreoffice-java-common:all - libreoffice-help-common:all - libreoffice-sdbc-firebird:amd64 - libreoffice-math:amd64 - libreoffice-sdbc-postgresql:amd64 - libreoffice-base-core:amd64 - libreoffice-sdbc-hsqldb:amd64 - libreoffice-help-de:all - libreoffice-writer:amd64 - libreoffice-base:amd64 - libreoffice-report-builder-bin:amd64 - libreoffice-report-builder:all - initramfs-tools:all -- Package-specific info: -- initramfs sizes -rw-r--r-- 1 root root 24M Dec 24 12:13 /boot/initrd.img-4.18.0-3-amd64 -rw-r--r-- 1 root root 25M Jan 5 11:42 /boot/initrd.img-4.19.0-1-amd64 -- /proc/cmdline BOOT_IMAGE=/vmlinuz-4.18.0-3-amd64 root=UUID=791fd67d-a815-429a-91f4-98418fda2d22 ro -- resume RESUME=UUID=09d693d3-96ff-40ae-bc0e-3d7e227123fb -- /proc/filesystems btrfs vfat -- lsmod Module Size Used by pci_stub 16384 1 vboxpci 28672 0 vboxnetadp 28672 0 vboxnetflt 32768 0 vboxdrv 491520 3 vboxpci,vboxnetadp,vboxnetflt snd_hda_codec_hdmi 61440 1 nls_ascii 16384 1 nls_cp437 20480 1 vfat 24576 1 fat 77824 1 vfat mxm_wmi 16384 0 intel_rapl 24576 0 sb_edac 24576 0 joydev 24576 0 x86_pkg_temp_thermal 16384 0 intel_powerclamp 16384 0 snd_usb_audio 249856 2 kvm_intel 237568 0 snd_usbmidi_lib 36864 1 snd_usb_audio snd_rawmidi 40960 1 snd_usbmidi_lib kvm 733184 1 kvm_intel uas 28672 0 snd_seq_device 16384 1 snd_rawmidi irqbypass 16384 1 kvm usb_storage 69632 1 uas crct10dif_pclmul 16384 0 crc32_pclmul 16384 0 ghash_clmulni_intel 16384 0 intel_cstate 16384 0 intel_uncore 135168 0 sg 36864 0 usblp 24576 0 intel_rapl_perf 16384 0 efi_pstore 16384 0 pcspkr 16384 0 efivars 20480 1 efi_pstore snd_hda_codec_realtek 114688 1 snd_hda_codec_generic 86016 1 snd_hda_codec_realtek iTCO_wdt 16384 0 iTCO_vendor_support 16384 1 iTCO_wdt snd_hda_intel 45056 2 snd_hda_codec 151552 4 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek snd_hda_core 94208 5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek mei_me 45056 0 snd_hwdep 20480 2 snd_usb_audio,snd_hda_codec mei 114688 1 mei_me snd_pcm 118784 5 snd_hda_codec_hdmi,snd_hda_intel,snd_usb_audio,snd_hda_codec,snd_hda_core snd_timer 36864 1 snd_pcm snd 94208 20 snd_hda_codec_generic,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_usb_audio,snd_usbmidi_lib,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_pcm,snd_rawmidi soundcore 16384 1 snd evdev 28672 11 wmi 28672 1 mxm_wmi pcc_cpufreq 16384 0 button 16384 0 nvidia_drm 45056 1 drm_kms_helper 196608 1 nvidia_drm drm 475136 4 drm_kms_helper,nvidia_drm nvidia_modeset 1110016 20 nvidia_drm nvidia 14397440 951 nvidia_modeset ipmi_devintf 20480 0 ipmi_msghandler 65536 2 ipmi_devintf,nvidia nct6775 65536 0 hwmon_vid 16384 1 nct6775 coretemp 16384 0 parport_pc 32768 0 ppdev 20480 0 lp 20480 0 parport 57344 3 parport_pc,lp,ppdev efivarfs 16384 1 ip_tables 28672 0 x_tables 45056 1 ip_tables autofs4 49152 2 hid_microsoft 16384 0 btrfs 1388544 10 xor 24576 1 btrfs zstd_decompress 94208 1 btrfs zstd_compress 188416 1 btrfs xxhash 16384 2 zstd_compress,zstd_decompress raid6_pq 122880 1 btrfs libcrc32c 16384 1 btrfs crc32c_generic 16384 0 hid_generic 16384 0 usbhid 57344 0 hid 135168 3 usbhid,hid_microsoft,hid_generic sd_mod 53248 6 sr_mod 28672 0 cdrom 69632 1 sr_mod crc32c_intel 24576 1 ahci 40960 5 libahci 40960 1 ahci aesni_intel 200704 1 xhci_pci 16384 0 aes_x86_64 20480 1 aesni_intel ehci_pci 16384 0 crypto_simd 16384 1 aesni_intel xhci_hcd 270336 1 xhci_pci ehci_hcd 94208 1 ehci_pci cryptd 28672 3 crypto_simd,ghash_clmulni_intel,aesni_intel glue_helper 16384 1 aesni_intel libata 278528 2 libahci,ahci nvme 36864 7 i2c_i801 28672 0 alx 53248 0 lpc_ich 28672 0 e1000e 282624 0 mdio 16384 1 alx scsi_mod 253952 6 sd_mod,usb_storage,uas,libata,sg,sr_mod usbcore 290816 10 xhci_hcd,ehci_pci,snd_usb_audio,usbhid,snd_usbmidi_lib,usblp,usb_storage,ehci_hcd,xhci_pci,uas usb_common 16384 1 usbcore nvme_core 77824 9 nvme -- /etc/initramfs-tools/modules -- /etc/kernel-img.conf # Kernel image management overrides # See kernel-img.conf(5) for details do_symlinks = yes do_bootloader = no do_initrd = yes link_in_boot = no -- /etc/initramfs-tools/initramfs.conf MODULES=most BUSYBOX=auto KEYMAP=n COMPRESS=gzip DEVICE= NFSROOT=auto RUNSIZE=10% -- /etc/initramfs-tools/update-initramfs.conf update_initramfs=yes backup_initramfs=no -- mkinitramfs hooks /etc/initramfs-tools/hooks/: /usr/share/initramfs-tools/hooks: btrfs dmsetup fsck fuse intel_microcode keymap klibc-utils kmod ntfs_3g resume thermal udev zz-busybox zz_nvidia-blacklists-nouveau -- System Information: Debian Release: buster/sid APT prefers testing APT policy: (900, 'testing'), (800, 'unstable'), (500, 'stable-updates'), (500, 'stable'), (101, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 4.18.0-3-amd64 (SMP w/8 CPU cores) Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE=de (charmap=UTF-8) Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages initramfs-tools depends on: ii initramfs-tools-core 0.132 ii linux-base 4.5 initramfs-tools recommends no packages. Versions of packages initramfs-tools suggests: ii bash-completion 1:2.8-5 -- no debconf information