SQUASHFS: Unable to read xattr id index table

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Hi,

I am attempting to install Fedora 25 on an HP Laptop. Here's what I did so far:

• Disabled secure boot in the BIOS. Made sure, that the USB stick is on top in the boot order.
• Created a bootable USB stick using

dd if=Fedora-Workstation-Live-x8664-26Alpha-1.7 of=/dev/sdb

• Booted from the USB stick. This works partially: The bootloader menu appears, and I can select Troubleshooting/Start Fedora Workstation Live 25 in basic graphics mode. (I tried the default start initially, but terminated that attempt, when nothing happened after quite some time.)

After a while, the following message appears:

squashfs: SQUASHFS error: unable to read xattr id index table
dracut-initqueue[519]: mount: wrong fs type, bad option, bad superblock on /dev/loop0,
dracut-initqueue[519]:             missing codepage or helper program, or other error
dracut-initqueue[519]:             In some cases useful info is found in syslog - try
dracut-initqueue[519]:             dmesg | tail or so.
dracut-initqueue[519]: umount: /run/initramfs/squashfs: not mounted

(The number 519 varies a bit between boot attempts.)

Any suggestions, or ideas, how to carry on?

Thanks,

Jochen