This problem was solved by reinstalling the package "base-files" as the folder /var/tmp/ was broken - thanks to pabs and the great IRC channel help.
Report can be closed. Thanks for your work! Maria: > Package: initramfs-tools > Version: 0.132 > Severity: important > File: initramfs > > Dear Maintainer, > > using apt, update-initramfs fails reproducably with 1: > > # LANG=C.UTF-8 apt-get install -f > Reading package lists... Done > Building dependency tree > Reading state information... Done > The following packages were automatically installed and are no longer > required: > clamz kio-audiocd libkf5compactdisc5 liblastfm1 liblvm2cmd2.02 > libqtscript4-core libqtscript4-gui libqtscript4-network libqtscript4-sql > libqtscript4-uitools libqtscript4-xml > libtag-extras1 > Use 'apt autoremove' to remove them. > 0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded. > 1 not fully installed or removed. > After this operation, 0 B of additional disk space will be used. > Setting up initramfs-tools (0.132) ... > update-initramfs: deferring update (trigger activated) > Processing triggers for initramfs-tools (0.132) ... > update-initramfs: Generating /boot/initrd.img-4.19.0-1-amd64 > mktemp: failed to create directory via template ‘/var/tmp/mkinitramfs_XXXXXX’: > No such file or directory > update-initramfs: failed for /boot/initrd.img-4.19.0-1-amd64 with 1. > dpkg: error processing package initramfs-tools (--configure): > installed initramfs-tools package post-installation script subprocess > returned > error exit status 1 > Errors were encountered while processing: > initramfs-tools > E: Sub-process /usr/bin/dpkg returned an error code (1) > > > The folder /var/tmp/ is not existing. > > # LANG=C.UTF-8 dpkg-reconfigure initramfs-tools > /usr/sbin/dpkg-reconfigure: initramfs-tools is broken or not fully installed > > I actually need that, to fix my system... > I have several other problems with my system but I don't think they are > related. If you need more logs, outputs etc. I'd be glad to provide. > > > Thanks for your help! > > > > -- Package-specific info: > -- initramfs sizes > -rw-r--r-- 1 root root 17M May 12 2016 /boot/initrd.img-3.16.0-4-amd64 > -rw-r--r-- 1 root root 29M Dec 5 20:46 /boot/initrd.img-4.18.0-3-amd64 > -rw-r--r-- 1 root root 29M Jan 1 10:35 /boot/initrd.img-4.19.0-1-amd64 > -rw-r--r-- 1 root root 20M May 14 2016 /boot/initrd.img-4.5.0-0.bpo.1-amd64 > -rw-r--r-- 1 root root 20M Oct 13 2016 /boot/initrd.img-4.5.0-2-amd64 > -rw-r--r-- 1 root root 20M Nov 16 2016 /boot/initrd.img-4.7.0-1-amd64 > -- /proc/cmdline > BOOT_IMAGE=/vmlinuz-4.19.0-1-amd64 > root=/dev/mapper/Himmel--voller--Sterne--vg-root ro quiet intel_iommu=igfx_off > > -- resume > RESUME=/dev/mapper/Himmel--voller--Sterne--vg-swap > -- /proc/filesystems > ext3 > ext2 > ext4 > vfat > fuseblk > > -- lsmod > Module Size Used by > ctr 16384 2 > ccm 20480 3 > fuse 122880 3 > acpi_call 16384 0 > cmac 16384 0 > rfcomm 86016 0 > bnep 24576 2 > uvcvideo 118784 0 > videobuf2_vmalloc 16384 1 uvcvideo > videobuf2_memops 16384 1 videobuf2_vmalloc > videobuf2_v4l2 28672 1 uvcvideo > videobuf2_common 53248 2 videobuf2_v4l2,uvcvideo > videodev 212992 3 videobuf2_v4l2,uvcvideo,videobuf2_common > media 45056 2 videodev,uvcvideo > btusb 53248 0 > btrtl 16384 1 btusb > btbcm 16384 1 btusb > btintel 24576 1 btusb > devlink 77824 0 > ebtable_filter 16384 0 > ebtables 36864 1 ebtable_filter > nf_tables 143360 0 > nfnetlink 16384 1 nf_tables > snd_hda_codec_hdmi 57344 1 > pci_stub 16384 1 > vboxpci 28672 0 > snd_hda_codec_realtek 118784 1 > snd_hda_codec_generic 86016 1 snd_hda_codec_realtek > vboxnetadp 28672 0 > vboxnetflt 32768 0 > vboxdrv 483328 3 vboxpci,vboxnetadp,vboxnetflt > bluetooth 643072 16 btrtl,btintel,btbcm,bnep,btusb,rfcomm > drbg 28672 1 > ansi_cprng 16384 0 > ecdh_generic 24576 1 bluetooth > cpufreq_userspace 16384 0 > cpufreq_powersave 16384 0 > cpufreq_conservative 16384 0 > binfmt_misc 20480 1 > nls_ascii 16384 1 > nls_cp437 20480 1 > vfat 20480 1 > fat 86016 1 vfat > msr 16384 0 > arc4 16384 2 > intel_rapl 24576 0 > x86_pkg_temp_thermal 16384 0 > intel_powerclamp 16384 0 > coretemp 16384 0 > kvm_intel 241664 0 > snd_soc_skl 118784 0 > snd_soc_skl_ipc 73728 1 snd_soc_skl > snd_soc_sst_ipc 16384 1 snd_soc_skl_ipc > snd_soc_sst_dsp 36864 1 snd_soc_skl_ipc > kvm 729088 1 kvm_intel > snd_hda_ext_core 28672 1 snd_soc_skl > snd_soc_acpi_intel_match 24576 1 snd_soc_skl > wmi_bmof 16384 0 > iwlmvm 294912 0 > irqbypass 16384 1 kvm > snd_soc_acpi 16384 2 snd_soc_acpi_intel_match,snd_soc_skl > intel_cstate 16384 0 > mac80211 819200 1 iwlmvm > snd_soc_core 258048 1 snd_soc_skl > snd_compress 24576 1 snd_soc_core > intel_uncore 135168 0 > snd_hda_intel 45056 2 > efi_pstore 16384 0 > i915 1728512 49 > intel_rapl_perf 16384 0 > iwlwifi 241664 1 iwlmvm > snd_hda_codec 151552 4 > snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek > snd_hda_core 94208 7 > snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_hda_codec_realtek,snd_soc_skl > rtsx_pci_ms 20480 0 > evdev 28672 27 > drm_kms_helper 204800 1 i915 > joydev 24576 0 > snd_hwdep 16384 1 snd_hda_codec > snd_pcm 114688 7 > snd_hda_codec_hdmi,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_soc_core,snd_soc_skl,snd_hda_core > mei_me 45056 0 > efivars 20480 1 efi_pstore > memstick 16384 1 rtsx_pci_ms > pcspkr 16384 0 > iTCO_wdt 16384 0 > thinkpad_acpi 106496 1 > mei 118784 1 mei_me > sg 36864 0 > serio_raw 16384 0 > iTCO_vendor_support 16384 1 iTCO_wdt > cfg80211 765952 3 iwlmvm,iwlwifi,mac80211 > snd_timer 36864 1 snd_pcm > drm 483328 25 drm_kms_helper,i915 > nvram 16384 1 thinkpad_acpi > tpm_tis 16384 0 > snd 94208 15 > snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_compress,thinkpad_acpi,snd_soc_core,snd_pcm > tpm_tis_core 20480 1 tpm_tis > intel_pch_thermal 16384 0 > i2c_algo_bit 16384 1 i915 > tpm 65536 2 tpm_tis,tpm_tis_core > soundcore 16384 1 snd > wmi 28672 1 wmi_bmof > rng_core 16384 1 tpm > rfkill 28672 10 bluetooth,thinkpad_acpi,cfg80211 > ac 16384 0 > battery 24576 1 thinkpad_acpi > video 45056 2 thinkpad_acpi,i915 > button 16384 0 > pcc_cpufreq 16384 0 > parport_pc 32768 0 > ppdev 20480 0 > lp 20480 0 > parport 57344 3 parport_pc,lp,ppdev > sunrpc 430080 1 > efivarfs 16384 1 > ip_tables 28672 0 > x_tables 45056 2 ebtables,ip_tables > autofs4 49152 2 > ext4 733184 4 > crc16 16384 2 bluetooth,ext4 > mbcache 16384 1 ext4 > jbd2 122880 1 ext4 > crc32c_generic 16384 0 > fscrypto 32768 1 ext4 > ecb 16384 0 > algif_skcipher 16384 0 > af_alg 28672 1 algif_skcipher > dm_crypt 40960 1 > dm_mod 151552 17 dm_crypt > sd_mod 53248 4 > crct10dif_pclmul 16384 0 > crc32_pclmul 16384 0 > crc32c_intel 24576 5 > ghash_clmulni_intel 16384 0 > pcbc 16384 0 > rtsx_pci_sdmmc 28672 0 > mmc_core 172032 1 rtsx_pci_sdmmc > xhci_pci 16384 0 > psmouse 172032 0 > xhci_hcd 266240 1 xhci_pci > aesni_intel 200704 5 > usbcore 290816 4 xhci_hcd,uvcvideo,btusb,xhci_pci > ahci 40960 3 > libahci 40960 1 ahci > aes_x86_64 20480 1 aesni_intel > crypto_simd 16384 1 aesni_intel > libata 278528 2 libahci,ahci > i2c_i801 28672 0 > usb_common 16384 1 usbcore > scsi_mod 249856 3 sd_mod,libata,sg > cryptd 28672 4 crypto_simd,ghash_clmulni_intel,aesni_intel > e1000e 282624 0 > glue_helper 16384 1 aesni_intel > rtsx_pci 73728 2 rtsx_pci_sdmmc,rtsx_pci_ms > thermal 20480 0 > > -- /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 > > -- /etc/initramfs-tools/update-initramfs.conf > update_initramfs=yes > backup_initramfs=no > > -- /etc/crypttab > sda3_crypt UUID=4047a03d-4df9-410f-93b0-47dad57bcdf0 none luks > > -- mkinitramfs hooks > /etc/initramfs-tools/hooks/: > > /usr/share/initramfs-tools/hooks: > cryptgnupg > cryptgnupg-sc > cryptkeyctl > cryptopensc > cryptpassdev > cryptroot > cryptroot-unlock > dmsetup > fsck > fuse > intel_microcode > keymap > klibc-utils > kmod > lvm2 > ntfs_3g > reiserfsprogs > resume > thermal > udev > zz-busybox > > > -- System Information: > Debian Release: buster/sid > APT prefers testing > APT policy: (990, 'testing') > Architecture: amd64 (x86_64) > > Kernel: Linux 4.19.0-1-amd64 (SMP w/4 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 /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 >