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This might be a duplicate, apologies if it is... I couldn't find anything exactly identical.

My system boots up just fine. But whenever it tries to resume from hibernation, I get to GRUB and then it hangs on a purple screen. ctrl+alt+F1 doesn't do anything. This problem started in the last week after working perfectly for a year.

In /var/log/pm-suspend.log the last entry is a bunch of successes for the sleep.d suspend_hybrid hooks. It seems like it successfully suspended.

In /var/log/syslog, I see it tries to boot with:

Command line: BOOT_IMAGE=/boot/vmlinuz-3.11.0-20-generic root=UUID=4666fbf8-118b-4336-bc4b-54c0e7dfd118 ro nosplash nomodeset acpi_osi=Linux acpi_backlight=vendor

then there's a ton of stuff in the syslog about NetworkManager and a few other things but no real errors.

Any ideas on how to debug this?

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