@jsalisbury: I had the machine tested with this kernel:
Linux xa-xubu 4.18.0-041800rc1-generic #201806162031 SMP Sun Jun 17 00:34:22 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
that I found via your link [0].
The result is that in this kernel, the problem is gone. So that sounds like good news!
I think there was another commenter asking me to try a (probably different) upstream kernel, but it seems gone now. To them I can report that I didn't try building a kernel myself, but hopefully their proposal was close enough to using the Ubuntu mainline kernel that this test gives them the answer they are looking for.
@jsalisbury: I had the machine tested with this kernel:
Linux xa-xubu 4.18.0- 041800rc1- generic #201806162031 SMP Sun Jun 17 00:34:22 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
that I found via your link [0].
The result is that in this kernel, the problem is gone. So that sounds like good news!
I think there was another commenter asking me to try a (probably different) upstream kernel, but it seems gone now. To them I can report that I didn't try building a kernel myself, but hopefully their proposal was close enough to using the Ubuntu mainline kernel that this test gives them the answer they are looking for.