Public bug reported:

[Impact]
EFIFB stops working after graphics device is runtime suspended in
D3cold.

[Fix]
Prevent the graphics device from being runtime suspended.

[Test]
With the patch applied, using efifb on graphics device without driver
always work, because the device stays at D0 all the time.

[Where problems could occur]
Potentially this can affect power consumption, if user expects to put
graphics device to D3cold, and is fine to get a broken efifb.

** Affects: hwe-next
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: linux-oem-5.10 (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu Focal)
     Importance: Undecided
         Status: New

** Affects: linux-oem-5.10 (Ubuntu Focal)
     Importance: Undecided
         Status: New

** Affects: linux (Ubuntu Groovy)
     Importance: Undecided
         Status: New

** Affects: linux-oem-5.10 (Ubuntu Groovy)
     Importance: Undecided
         Status: New


** Tags: oem-priority originate-from-1911688 originate-from-1912181 
originate-from-1912299 somerville

** Also affects: linux-oem-5.10 (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Groovy)
   Importance: Undecided
       Status: New

** Also affects: linux-oem-5.10 (Ubuntu Groovy)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Focal)
   Importance: Undecided
       Status: New

** Also affects: linux-oem-5.10 (Ubuntu Focal)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1914411

Title:
  Fix broken efifb on graphics device without driver

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