Comment 227 for bug 1671360

I'm getting a similar error on an Acer E5-553G laptop (AMD Excavator, not Ryzen). It doesn't prevent the system from booting but does make the ELAN touchpad stop working shortly after boot, with similar dmesg output (though seemingly on a smaller volume - the bad_chained_irq errors take awhile to page through with less, but don't come anywhere near filling a 400MB file, and stop completely after the touchpad switches off). This occurs with all recent kernel versions I've tried (4.9.30, 4.10.17, 4.11.3) except 4.12-rc2, which doesn't get this error but also doesn't recognize the touchpad at all. With 4.12-rc3, it is back to the same behavior as the 4.11.3 kernel.

The only kernel I have found that works is the Ubuntu 4.4 kernel. The stock 4.4.70 kernel gets the same error, but if I replace the pinctrl-amd.c file with the version from the Ubuntu 16.04 kernel, it works fine. I haven't tried using the Ubuntu 4.4 pinctrl-amd.c file with newer kernels, but presume that it would be incompatible. I did look at the Ubuntu 17.04 kernel tree (4.10) on github and noticed that there's no difference between that pinctrl-amd.c and the upstream one, so it looks like Ubuntu has only fixed this issue in the 4.4 kernel series.

I have not yet tried updating the BIOS since Acer only provides the update as a Windows EXE.