[Mageia-dev] What the hell is wrong with MGA2s suspend/sleep/hibernate?

[Frank Griffin]

On 11/20/2012 12:30 AM, Johnny A. Solbu wrote:
> In the last day, a simple typo have sendt my MGA2 desktop system so sleep. (The Sleep key is right next to the F12 key. I use F12 extensively.)
> When it wakes up, there is NO network (ethernet) of any kind. Nothing!
Assuming you're using KDE, KDE Power Management has been AFU for months 
now.

Originally, the problem was that if you disabled all use of 
sleep/hibernate, dpms would get turned on with a random (usually short) 
timeout, and the display would randomly (and often) go dark.

This never got fixed, but new PM bugs have surfaced.  What I notice 
currently is that PM has lost the ability to distinguish 
AC/Battery/LowBattery.  I was seeing the display dim when on AC, even 
though dimming was shut off for AC.  On a guess, I shut off dimming for 
Battery, and the display brightened again.  After a while, it dimmed 
again, so I shut dimming off for LowBattery, and it brightened up again 
and hasn't dimmed since.

So, my advice would be to disable Sleep/Hibernate on all power settings 
and see if your symptom disappears.