Mount /sys/firmware/efi/efivars unknown filesystem type 'efivarfs' after reboot

I basically run into this error after rebooting without any apparent obvious reason (no big update recently). I saw that it is adviced to chroot the system from usb live in order to repair the grub but as I’m still able to boot after waiting a few seconds after I obtained the error on a black screen, I’m not sure in what to do.

My sys info :

  Kernel: 5.6.19-3-rt12-MANJARO x86_64 bits: 64 compiler: gcc v: 10.2.0 
  parameters: BOOT_IMAGE=/boot/vmlinuz-5.6-rt-x86_64 
  root=UUID=e8301361-d58c-4e06-b0eb-2f39c83e9349 rw quiet 
  Desktop: KDE Plasma 5.19.5 tk: Qt 5.15.1 info: latte-dock wm: kwin_x11 
  dm: SDDM Distro: Manjaro Linux 
  Type: Laptop System: LENOVO product: 80JH v: Lenovo Yoga 3 14 
  serial: <filter> Chassis: type: 10 v: Lenovo Yoga 3 14 serial: <filter> 
  Mobo: LENOVO model: Lenovo Yoga 3 14 v: 31900058WIN serial: <filter> 
  UEFI: Lenovo v: BACN36WW date: 05/20/2015 
  ID-1: BAT0 charge: 28.1 Wh condition: 28.1/44.4 Wh (63%) volts: 8.4/7.5 
  model: LENOVO LCFC type: Unknown serial: <filter> status: Full 
  Topology: Dual Core model: Intel Core i5-5200U bits: 64 type: MT MCP 
  arch: Broadwell family: 6 model-id: 3D (61) stepping: 4 microcode: 2F 
  L2 cache: 3072 KiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx 
  bogomips: 17567 
  Speed: 2494 MHz min/max: 500/2700 MHz Core speeds (MHz): 1: 2494 2: 2494 
  3: 2512 4: 2512 
  Vulnerabilities: Type: itlb_multihit status: KVM: Split huge pages 
  Type: l1tf 
  mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable 
  Type: mds mitigation: Clear CPU buffers; SMT vulnerable 
  Type: meltdown mitigation: PTI 
  Type: spec_store_bypass 
  mitigation: Speculative Store Bypass disabled via prctl and seccomp 
  Type: spectre_v1 
  mitigation: usercopy/swapgs barriers and __user pointer sanitization 
  Type: spectre_v2 mitigation: Full generic retpoline, IBPB: conditional, 
  IBRS_FW, STIBP: conditional, RSB filling 
  Type: srbds mitigation: Microcode 
  Type: tsx_async_abort status: Not affected 
  Device-1: Intel HD Graphics 5500 vendor: Lenovo driver: i915 v: kernel 
  bus ID: 00:02.0 chip ID: 8086:1616 
  Device-2: Sunplus Innovation Lenovo EasyCamera type: USB driver: uvcvideo 
  bus ID: 1-1:2 chip ID: 1bcf:2c43 
  Display: x11 server: X.Org 1.20.9 compositor: kwin_x11 driver: intel 
  unloaded: modesetting alternate: fbdev,vesa display ID: :0 screens: 1 
  Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x285mm (20.0x11.2") 
  s-diag: 582mm (22.9") 
  OpenGL: renderer: Mesa Intel HD Graphics 5500 (BDW GT2) v: 4.6 Mesa 20.1.8 
  direct render: Yes 
  Device-1: Intel Broadwell-U Audio vendor: Lenovo driver: snd_hda_intel 
  v: kernel bus ID: 00:03.0 chip ID: 8086:160c 
  Device-2: Intel Wildcat Point-LP High Definition Audio vendor: Lenovo 
  driver: snd_hda_intel v: kernel bus ID: 00:1b.0 chip ID: 8086:9ca0 
  Sound Server: ALSA v: k5.6.19-3-rt12-MANJARO 
  Device-1: Intel Wireless 3160 driver: iwlwifi v: kernel port: efa0 
  bus ID: 02:00.0 chip ID: 8086:08b4 
  IF: wlp2s0 state: up mac: <filter> 
  Device-2: ASIX AX88179 Gigabit Ethernet type: USB driver: ax88179_178a 
  bus ID: 2-1.4:3 chip ID: 0b95:1790 serial: <filter> 
  IF: enp0s20u1u4 state: up speed: 100 Mbps duplex: full mac: <filter> 
  Local Storage: total: 238.47 GiB used: 199.58 GiB (83.7%) 
  SMART Message: Unable to run smartctl. Root privileges required. 
  ID-1: /dev/sda vendor: Samsung model: MZYTE256HMHP-000L2 size: 238.47 GiB 
  block size: physical: 512 B logical: 512 B speed: 6.0 Gb/s serial: <filter> 
  rev: 6L0Q scheme: GPT 
  ID-1: / raw size: 238.17 GiB size: 233.43 GiB (98.01%) 
  used: 199.58 GiB (85.5%) fs: ext4 dev: /dev/dm-0 
  Alert: No Swap data was found. 
  System Temperatures: cpu: 57.0 C mobo: N/A 
  Fan Speeds (RPM): N/A 
  Processes: 227 Uptime: 27m Memory: 7.66 GiB used: 2.04 GiB (26.6%) 
  Init: systemd v: 246 Compilers: gcc: 10.2.0 clang: 10.0.1 Packages: 
  pacman: 1671 lib: 401 flatpak: 0 Shell: Zsh v: 5.8 running in: konsole 
  inxi: 3.1.05

Welcome at the forum, @syrell

First, I would check if this is solved when you run another kernel as you are on a real-time kernel. They sometimes show this warning. So, install 5.4 or 5.8, boot into it and check again:

If this does not help, check boot options in your UEFI firmware and make sure that

  1. no secure boot is enabled
  2. no fast boot is enabled
  3. no csm is enabled
  4. only UEFI is enabled
  5. only AHCI disks is enabled

Then, please post output of

test -d /sys/firmware/efi && echo efi || echo bios
sudo efibootmgr -v
sudo parted -l
lsblk -f


Thanks for the informations ! I’ll try your procedure and will come back later on to tell you how it went :slight_smile:

1 Like

Howdy! If the issue still occus, time to chroot!

If so, please boot into a live iso, then provide me the output of lsblk, thank you!:grinning_face_with_smiling_eyes:

1 Like

There is no need to chroot as long as OP is still able to boot. :wink:

1 Like

That’s why I’m waiting for the user’s input!:sweat_smile:

The point is you missed that ability to boot was never the issue:

Your help is highly appreciated :grinning: but please, read the post carefully before providing advice to avoid confusion.

1 Like

Hey, changing to 5.8 kernel seems to solve the issue ty !


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