Please try kernel at [1] without 'nvme_core.default_ps_max_latency_us=' parameter, it includes '[PATCH v3 0/2] nvme APST quirk updates, take two'.
It does two things: 1. Enable APST to ps3 on Dell XPS/Precision with Samsung NVMe, 2. Disable APST on Toshiba NVMe.
[1] http://people.canonical.com/~khfeng/lp1678184/
Please try kernel at [1] without 'nvme_core. default_ ps_max_ latency_ us=' parameter, it includes '[PATCH v3 0/2] nvme APST quirk updates, take two'.
It does two things:
1. Enable APST to ps3 on Dell XPS/Precision with Samsung NVMe,
2. Disable APST on Toshiba NVMe.
[1] http:// people. canonical. com/~khfeng/ lp1678184/