Comment 45 for bug 1774950

@perryhelionsemail: Thank you for putting all this info together and for staying at it! :)

Just to weigh in: I am affected, too, on an ACER Aspire V 11 Touch (V3-111P-P06A), N3530 CPU, Intel onboard graphics, 8GB RAM (not original) and 480 GB SSD (not original), and having the boot flag intel_idle.max_cstate=1 activated.

I just installed the kernel patch provided by @kaihengfeng. It seems to fix the suspend/resume issue for me, as well. Haven't tried hibernate, yet.

However, two new issues became apparent for me right away:

1. Upon system start, after the Ubuntu loading screen (the purple-ish screen with the five dots below "Ubuntu"), the screen goes black with a blinking cursor on the top left, and later black altogether, and stays that way for quite some time, sometimes for minutes, until I finally get to the greeter and can login to my DE (Cinnamon 3.8). This does not happen with 4.15.0-23, pre-patch. While "waiting", I can log in to the TTYs, however.

2. I am also seeing a lot of graphics issues now, parts of the background and panel wildly flickering black; looks like some problem with transparencies of panels, desklets and notification popups. Just to be sure, I just checked back by booting back and forth between pre-patch kernel and patched kernel. In 4.15.0-23 I couldn't observe any such flickering thus far.

As I just upgraded to 18.04 this last weekend, and instantly ran into another problem (default Ubuntu and Cinnamon counter-acting each other) which I managed to solve only recently, I don't really have much mileage with 18.04 so far. So, possibly, the above "new" issues are totally unrelated to the patch. But still, apparently, the issues don't occur without the patch.