display issue after Suspend

[arp]

Do you mean to try these commands and then go into suspend, and see if it's normal afterwords? Or try these when the screen is not displaying properly?

[Charlie Brown]

Yep, just when that happens after a suspend & wake-up (to see if any of them works).

[arp]

I tried these. The second and third ones causes the screen to go back briefly but came back again with the resolution problem. The first one didn't do anything noticiable...

[Charlie Brown]

Ok. In fact I remember a very similar one, again with radeon, again with a reddish screen etc... The verdict was that it was a hardware problem.

In this case (what we did) It turns off and turns on with the wrong resolution even when we state what it should be (the 3rd one) , and though it shows the resolution and drivers are already ok ...

[arp]

OK, got it. It did work fine with MX19 though. But it's not too hard to just avoid using Suspend. Thanks

[Charlie Brown]

Ah, ok, I was just writing this:

The only thing I would try:

Is it the same if you try any other distro on live session?

______________

However the main difference (with MX19) is the 4.19 kernel, that you already tried ... Then maybe others are affecting, mesa version etc...

[arp]

OK, I can try the MX19 live USB.... will report....

[Charlie Brown]

Ok, but since you already know it was ok there, you can skip that if you like ...

[arp]

Well it actually didn't work with MX19 live disk. Corrupted video just like the current version. I recall when I was installing Linux on this Mac three years ago for the first time, I had trouble with most distros. They had the suspend/wakeup issue. I was able to get MX Linux to work properly, I think by doing something with the partitions on install. But I don't remember what the trick was :(

[Charlie Brown]

Since it's a desktop, have you tried with another type of connection? DVI etc.. Or playing with cables when that happens, unplug and plug ...