If we don't yet know what patch in v4.15-rc4 fixes the bug, we can perform a "Reverse" bisect to identify the fix.
Can you test v4.14-rc1, so we can narrow down the last bad kernel version and the first good one? It can be downloaded from:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.14-rc1/
If we don't yet know what patch in v4.15-rc4 fixes the bug, we can perform a "Reverse" bisect to identify the fix.
Can you test v4.14-rc1, so we can narrow down the last bad kernel version and the first good one? It can be downloaded from:
http:// kernel. ubuntu. com/~kernel- ppa/mainline/ v4.14-rc1/