Comment 0 for bug 1758375

[Impact]
The following error is reported on boot:

[ 6.290553] pci 0004:21:00.0: BAR 0: failed to claim resource for efifb!

This results in the efifb not being activated at boot. On this platform, the same device will be initialized by the astdrmfb driver later in boot, so this isn't fatal, so the real SRU justification here is getting rid of the error message. It is possible that there are platforms where the efifb is behind a PCI bridge, and there is no accelerated alternative that will load later. This (theoretical) issue is most likely to impact d-i installs, where only a subset of fb drivers are included.

[Test Case]
dmesg | grep "failed to claim resource for efifb"

[Regression Risk]
The fix for this has been upstream since v4.14. I have a test fix in ppa:dannf/efifb for regression testing.