Hello! I've found two bugs in powertop. First one is that only first audio card will be shown in Devices stats tab. Second one is that all PCI devices shows usage as 00% in the same tab. Here are the patches against commit 180ac4fd196d169cd788ab13ccadf365d75d986b: Yaroslav Isakov (2): Detect all audio cards in the system (not only card0) Fixed bug when all PCI devices usage is shown as 00% src/devices/alsa.cpp | 6 +++--- src/devices/runtime_pm.cpp | 1 + 2 files changed, 4 insertions(+), 3 deletions(-)