Comment 133 for bug 1878279

This is a follow-up to comment #123

Sorry for the long silence on this bug. I was hoping one of the upstream pci-subsys devs would help out with this...

Since that did not happen I've been looking into fixing this myself now. I've come up with a solution which still involves a kernel cmdline option for now, but this one is a much smaller hammer (almost a scalpel) and once it is confirmed that this works I can enable this by default through a DMI quirk.

I also hope that this option will not cause the stability issues seen when using pci=nocrs and that it will remove the need to specify i8042.nopnp=1 .

I'll attach my patch here and then hopefully one of the Ubuntu devs can build a test-kernel for people who need pci=nocrs to test.

Alternatively you can build your own kernel with this patch added, see the Ubuntu docs for how to do this.

Once you have a kernel with this patch, remove pci=nocrs and i8042.nopnp=1 from the kernel-commandline and instead add only "pci=no_e820".

If this helps please provide DMI strings for your laptop, so that I can add a quirk to the kernel to automatically enable "pci=no_e820" on your laptop model. Run the following command *as normal user* to collect the DMI strings for your laptop:

grep . /sys/class/dmi/id/* 2> /dev/null

And copy and paste the output here.