I got this problem. With ubuntu 20.04 and 20.10. The downloaded iso was ok. Checked by SHA-256 hash sum. Bootable usb device made with Rufus under Windows 8.1. Got bloc errors : 2. But no problems found with chkdsk. The check at the linux set up start gives 1 error too. The squashfs errors occur.
With ubuntu 20.10. On the usb device there is a directory casper with a large file filesystem.squashfs. Compare for that file the SHA-256 hash sum between original iso and usb device one : got different. But sizes was the same. Just rewrite this erroneous file from the original iso to the usb device. Ok with a simple drag and drop. Usb device file SHA-256 hash sum now OK. Check at the linux set up start now OK. And finally linux install was OK, with no more the SQUASHFS errors. Chris. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1874662 Title: Corrupted installation medium To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1874662/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs