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Hello,

I've the same issue with my W540.

Just edit the following file with root rights:

sudo vim /etc/default/grub

and add "ahci.mobile_lpm_policy=0" in the GRUB_CMDLINE_LINUX:

for example: GRUB_CMDLINE_LINUX=" {...} ahci.mobile_lpm_policy=0 rhgb quiet"

Then you need to rebuild grub (depends on UEFI or not)

UEFI

grub2-mkconfig -o /boot/efi/EFI/fedora/grub.cfg

BIOS:

grub2-mkconfig -o /boot/grub2/grub.cfg