Comment 149 for bug 1878279

I think this is caused by the PCI core not assigning space for a device leading to the touchpad, the same as bug 216565.

You probably see a line like this in the dmesg log:

  pci 0000:00:15.0: BAR 0: no space for [mem size 0x00001000 64bit]

On Ideapads, it should be fixed by https://git.kernel.org/linus/d341838d776a ("x86/PCI: Disable E820 reserved region clipping via quirks"), which appeared in v5.19.

The patch at https://bugzilla.kernel.org/attachment.cgi?id=303237 should fix other machines. If you test this patch, I'd appreciate a note about whether it works and what machine it was.