Sorry. No go on latest mainline kernel. (It gets worse. Touchscreen doesn't work at all!) Anyhoo, here's the output:
$ uname -a Linux kneetm 4.2.0-040200rc2-generic #201507121935 SMP Sun Jul 12 23:36:39 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux $ sudo evtest /dev/input/event1 Input driver version is 1.0.1 Input device ID: bus 0x19 vendor 0x0 product 0x1 version 0x0 Input device name: "Power Button" Supported events: Event type 0 (EV_SYN) Event type 1 (EV_KEY) Event code 116 (KEY_POWER) Properties: Testing ... (interrupt to exit) ^C [No output from pressing button] $ cat /sys/firmware/acpi/interrupts/ff_pwr_btn 0 invalid $ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1472478 Title: Power button not working on Dell Venue 11 Pro 7140 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1472478/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs