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I tried to install Ubuntu 20.10 normally using USB stick but once I choose the first setup option *Ubuntu I cannot continue to the next step, so I choose the second choice Ubuntu (safe graphics).

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After finishing the installation I cannot choose the first option from GRUB screen which is (Ubuntu) I used to choose the second one (Advanced options for Ubuntu) and the error below shown to me and I restarted the system many times so I can access Ubuntu with low graphics and low resolution.

[     0.298008] Initramfs unpacking failed: Decoding failed
/dev/sdb5: Clean, 207672/6225920 files, 3573307/24882688 blocks

I have SSD as sda for Windows and HDD as sdb for data and I reserved 70G for Ubuntu, and UEFI system.

Also I select sdb as device for boot loader installation, so I kept every system on its disk to avoid booting problems.

My PC specs: CPU Ryzen 5 1600AF M.B. MSI b450 tomahawk max RAM 16G GPU AMD Rx 570 4G

Kindly advise me to sort this problem out!

Ghorab.ws
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1 Answers1

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I had that issue recently, and it seems to happen very frequently with AMD hardware

Here are the steps :

  • With the selector on your main GRUB entry type e to enter the editor
  • Find the entry that starts with linux
  • Delete quiet splash (or anything you have at the end of the line, but not touching any word that starts with a $) from the line (don't worry the change is only going to last one boot) replacing it with nomodeset (the line should look like this
linux   /boot/vmlinuz-5.9.12-050912-generic root=UUID=<REDACTED> ro nomodeset $vt_handoff
  • Boot using F10 and wait to be spawned to the DE (if you don't no worry, stike Ctrl-Alt-F2 to enter the tty)
  • Once logged and within an open terminal run :
sudo -i
nano /etc/initramfs-tools/initramfs.conf

Change the COMPRESS line from COMPRESS=lz4 to COMPRESS=gzip

Save the changes (Ctrl+x | y | Return)

then run update-initramfs -u

Reboot and done

Nicolas Formichella
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  • I tried this solution, after reboot from the first choice "Ubuntu" it takes a while with black screen then I hear an loud sound of the PC's fan and I should reboot the PC using the power button! Although I added the "nomodeset" as you mentiond above. Thank you – Ghorab.ws Jan 05 '21 at 19:51