Hi,

I am also impacted. 18.04 with 5.0 and 4.15 kernels.

My system also freezes from time to time.


```
[  171.384150] pci_bus 0000:03: Allocating resources
[  171.384173] pcieport 0000:03:01.0: bridge window [io  0x1000-0x0fff] to [bus 
05-39] add_size 1000
[  171.384181] pcieport 0000:03:02.0: bridge window [io  0x1000-0x0fff] to [bus 
3a] add_size 1000
[  171.384182] pcieport 0000:03:02.0: bridge window [mem 0x00100000-0x000fffff 
64bit pref] to [bus 3a] add_size 200000 add_align 100000
[  171.384190] pcieport 0000:02:00.0: bridge window [io  0x1000-0x0fff] to [bus 
03-3a] add_size 3000
[  171.384192] pcieport 0000:02:00.0: BAR 13: no space for [io  size 0x3000]
[  171.384193] pcieport 0000:02:00.0: BAR 13: failed to assign [io  size 0x3000]
[  171.384194] pcieport 0000:02:00.0: BAR 13: no space for [io  size 0x3000]
[  171.384194] pcieport 0000:02:00.0: BAR 13: failed to assign [io  size 0x3000]
[  171.384196] pcieport 0000:03:02.0: BAR 15: no space for [mem size 0x00200000 
64bit pref]
[  171.384197] pcieport 0000:03:02.0: BAR 15: failed to assign [mem size 
0x00200000 64bit pref]
[  171.384198] pcieport 0000:03:01.0: BAR 13: no space for [io  size 0x1000]
[  171.384198] pcieport 0000:03:01.0: BAR 13: failed to assign [io  size 0x1000]
[  171.384199] pcieport 0000:03:02.0: BAR 13: no space for [io  size 0x1000]
[  171.384200] pcieport 0000:03:02.0: BAR 13: failed to assign [io  size 0x1000]
[  171.384201] pcieport 0000:03:02.0: BAR 15: no space for [mem size 0x00200000 
64bit pref]
[  171.384201] pcieport 0000:03:02.0: BAR 15: failed to assign [mem size 
0x00200000 64bit pref]
[  171.384202] pcieport 0000:03:02.0: BAR 13: no space for [io  size 0x1000]
[  171.384203] pcieport 0000:03:02.0: BAR 13: failed to assign [io  size 0x1000]
[  171.384203] pcieport 0000:03:01.0: BAR 13: no space for [io  size 0x1000]
[  171.384204] pcieport 0000:03:01.0: BAR 13: failed to assign [io  size 0x1000]
[  176.033220] [drm:intel_pipe_update_end [i915]] *ERROR* Atomic update failure 
on pipe A (start=12148 end=12149) time 3562 us, min 1073, max 1079, scanline 
start 1071, end 192
[  176.486807] pcieport 0000:03:00.0: Refused to change power state, currently 
in D3
[  176.556903] pci_bus 0000:04: busn_res: [bus 04] is released
[  176.556962] pci_bus 0000:05: busn_res: [bus 05-39] is released
[  176.557053] pci_bus 0000:3a: busn_res: [bus 3a] is released
[  176.557161] pci_bus 0000:03: busn_res: [bus 03-3a] is released
```

I have also quite lot of :

[drm:intel_pipe_update_end [i915]] *ERROR* Atomic update failure on pipe
A (start=12148 end=12149) time 3562 us, min 1073, max 1079, scanline
start 1071, end 192

Not sure if related. I can give more details if requested.

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https://bugs.launchpad.net/bugs/1426216

Title:
  pci driver messages - BAR 13: no space for

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