I recently purchased an HP Notebook 17-y020ca and installed Ubuntu 16.04. I originally had to overcome some WiFi issues with the Broadcom Corporation BCM43142 wireless card, but now that side of things appears to be working well.
Unfortunately, there is a fatal issue remaining: the laptop is completely unable to resume after suspending. This behavior is deterministic -- while suspend appears to place the computer in a standard "suspended" state (with a slowly blinking light), a resume following a suspension yields a slightly glowing screen with no text or indication of display of any content. Perhaps most notably, the disk light flickers occasionally (suggesting that some processes remain active), but the computer is completely unresponsive.
Control-Alt-F1 (which normally brings me to another console) does nothing While it is possible that this is simply a display problem, I have not been able to escape via anything but a complete shutdown.
As the video device is often suspect in similar problems experienced by others, I would note that the information on my video card (as output from "lspci -vnn | grep -A12 VGA") is as follows:
00:01.0 VGA compatible controller : Advanced Micro Devices, Inc. [AMD/ATI] Carrizo [1002:9874] (rev ca) (prog-if 00 [VGA controller]) DeviceName: ATI UMA EG BROADWAY Subsystem: Hewlett-Packard Company Carrizo [103c:8221] Flags: bus master, fast devsel, latency 0, IRQ 226 Memory at e0000000 (64-bit, prefetchable) [size=256M] Memory at f0000000 (64-bit, prefetchable) [size=8M] I/O ports at 3000 [size=256] Memory at f0d00000 (32-bit, non-prefetchable) [size=256K] Expansion ROM at f0d80000 [disabled] [size=128K] Capabilities:  Vendor Specific Information: Len=08 Capabilities:  Power Management version 3 Capabilities:  Express Root Complex Integrated Endpoint, MSI 00 Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+`
Contents of/var/log/pm-suspend.log on my computer can be found here.
The following is the contents of my /proc/cmdline
BOOT_IMAGE=/vmlinuz-4.4.0-21-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
Please note that an upgrade of the kernel to 4.4.8 (as advocated on many other threads involving suspend/resume problems) does not solve this problem.
While I have investigated it less closely, I would note that hibernate/unhibernate also reliably fails on this machine.
I would be truly grateful for any suggestions that anyone could give. I would be happy to share output from journalctl, dmesg or other tools if readers think that this may be of help. I much appreciate your consideration!