On Wed, Aug 21, 2024 at 11:32:04PM +0200, Paul Menzel wrote: > Dear Linux folks, > > > On the Intel Kaby Lake laptop Dell XPS 13 9360 with Debian sid/unstable and > *powertop* 2.15-3, connecting a USB-C adapter like Dell DA300 or LMP USB-C > mini Dock (P/N 15954) [1] and connecting only an Ethernet cable (module > r8152 is used), the adapter gets very hot, and according to PowerTOP it uses > over 5 Watts – almost more as the laptop idling. > > $ lsusb > Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > Bus 001 Device 002: ID 0cf3:e300 Qualcomm Atheros Communications QCA61x4 > Bluetooth 4.0 > Bus 001 Device 003: ID 04f3:2234 Elan Microelectronics Corp. Touchscreen > Bus 001 Device 004: ID 0c45:670c Microdia Integrated Webcam HD > Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub > Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > Bus 003 Device 002: ID 2109:2820 VIA Labs, Inc. VL820 Hub > Bus 003 Device 003: ID 06c4:c412 Bizlink International Corp. DELL DA300 > Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub > Bus 004 Device 002: ID 2109:0820 VIA Labs, Inc. VL820 Hub > Bus 004 Device 003: ID 0bda:8153 Realtek Semiconductor Corp. RTL8153 > Gigabit Ethernet Adapter > > With `LANG= sudo powertop --auto-tune` it stays high. > > PowerTOP: > > ``` > The battery reports a discharge rate of 6.01 W > The energy consumed was 146 J > The estimated remaining time is 3 hours, 51 minutes > > Summary: 384.6 wakeups/second, 0.0 GPU ops/seconds, 0.0 VFS ops/sec and > 8.5% CPU use > > Power est. Usage Events/s Category Description > 5.94 W 0.0% Device Display backlight > 5.23 W 100.0% Device USB device: USB > Optical Mouse (Logitech) > 4.62 W 66.1% Device USB device: USB > 10/100/1000 LAN (Realtek) > 205 mW 100.0% Device USB device: Fujitsu > Keyboard (Fujitsu) > 14.1 mW 13.5 ms/s 0.9 kWork intel_atomic_commit_work > ``` > > At another time: > > ``` > The battery reports a discharge rate of 10.5 W > The energy consumed was 235 J > The estimated remaining time is 2 hours, 20 minutes > > Summary: 395.8 wakeups/second, 0.0 GPU ops/seconds, 0.0 VFS ops/sec and > 23.8% CPU use > > Power est. Usage Events/s Category Description > 7.13 W 100.0% Device USB device: USB > 10/100/1000 LAN (Realtek) > 3.92 W 15.8% Device Display backlight > 320 mW 0.0 us/s 0.00 Process [PID 1349] > /usr/bin/pipewire > 63.6 mW 65.4 ms/s 0.5 Process [PID 4982] > /usr/lib/thunderbird/thunderbird > 24.9 mW 25.6 ms/s 6.7 Process [PID 37753] > /usr/lib/firefox-nightly/firefox-bin -contentproc -isForBrowser -prefsLen > 36793 -prefMapSize 265654 -jsInitLe > 14.7 mW 15.1 ms/s 0.5 kWork intel_atomic_commit_work > ``` > > The heat of the USB-C adapter might suggest, that it draws that much power. > What is your experience? Can you suggest something? Buy a different adapter? That seems like something is really wrong with it. Does other devices also suck that much power from that port on the laptop? thanks, greg k-h
