On Wed, May 16, 2018 at 07:16:26AM +0200, Christian Brauns wrote: > Hi, > > I'm not used to writing bug-reports. > > From: https://bbs.archlinux.org/viewtopic.php?id=236806, I got adviced to do that. > > I have an usb 3 controller laptop expresscard > Renesas Technology Corp. uPD720202 USB 3.0 Host Controller (rev 02) > using that in a Lenovo X220 which does not work with the latest kernels. > In a Lenovo R400 it works. > > After some testing, I came to the result, that > it was still working in kernel 4.12.7, and stopped working in kernel 4.12.8. > > And with some advice and further testing it produces the same (working) results in > kernel 4.12.8 with 0e1f0eaed6c20db41ff61e024b361ee3ec9d686c reverted. > > ( > > git checkout v4.12.8 > git revert 0e1f0eaed6c20db41ff61e024b361ee3ec9d686c #revert the noted commit > git cherry-pick 854e55ad289ef8888e7991f0ada85d5846f5afb9 #cherry-pick a commit needed to build with gcc 8 > git cherry-pick ad343a98e74e85aa91d844310e797f96fee6983b > ) > > There is a post from someone else regarding this controller at: > https://unix.stackexchange.com/questions/440741/install-usb-3-0-express-card-under-linux-arch-linux-tried-adding-kernel-param > who made a bug report here: > https://bugzilla.kernel.org/show_bug.cgi?id=199627 > I don't understand, the 4.12.y kernel tree is long end-of-life, why are you using that one? Does 4.16 work? 4.14.y? Why are you using gcc8 on 4.12.y anyway, that is not going to work for you very well, it barely, if at all, works on Linus's latest tree. thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
