Public bug reported:

Up to linux-image-5.4.0-81-generic Ubuntu was working normally. With the
new image linux-image-5.4.0-84-generic Ubuntu starts very slow, with
very high GPU use and the gnome login window actually never comes up.
(The colored screen comes up after some time, but stays without name
etc.)

If I switch to the console, this is inundated by the message:

pcieport 0000:00:1d.3: pciehp: Failed to check link status

This makes the console unusable too.

In the kernel log I find two more lines which might be relevant:

pcieport 0000:00:1d.3: Data Link Layer Link Active not set in 1000 msec
pcieport 0000:00:1d.3: pciehp: Failed to check link status
pcieport 0000:00:1d.3: pciehp: Slot(11): Card present

I have Ubuntu 20.04.3 LTS. The relevant package might be linux-
image-5.4.0-84-generic (5.4.0-84.94), but it could also be linux-
modules-5.4.0-84-generic (5.4.0-84.94) or linux-modules-
extra-5.4.0-84-generic (5.4.0-84.94).

** Affects: ubuntu
     Importance: Undecided
         Status: New

** Description changed:

  Up to linux-image-5.4.0-81-generic Ubuntu was working normally. With the
  new image linux-image-5.4.0-84-generic Ubuntu starts very slow, with
  very high GPU use and the gnome login window actually never comes up.
  (The colored screen comes up after some time, but stays without name
  etc.)
  
  If I switch to the console, this is inundated by the message:
  
  pcieport 0000:00:1d.3: pciehp: Failed to check link status
  
  This makes the console unusable too.
  
- In the kernel log I find too more lines which might be relevant:
+ In the kernel log I find two more lines which might be relevant:
  
  pcieport 0000:00:1d.3: Data Link Layer Link Active not set in 1000 msec
  pcieport 0000:00:1d.3: pciehp: Failed to check link status
  pcieport 0000:00:1d.3: pciehp: Slot(11): Card present
  
  I have Ubuntu 20.04.3 LTS. The relevant package might be linux-
  image-5.4.0-84-generic (5.4.0-84.94), but it could also be linux-
  modules-5.4.0-84-generic (5.4.0-84.94) or linux-modules-
  extra-5.4.0-84-generic (5.4.0-84.94).

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https://bugs.launchpad.net/bugs/1943197

Title:
  Ubuntu unusable with new kernel. pciehp: Failed to check link status

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