Did you investigate KDE power systemsettings ?pythagorasmk wrote:How to configure KDE to use pm-suspend, so I can configure KDE after 30 min to suspend the machine?
https://docs.kde.org/trunk5/en/kde-work ... energy.png
You should first evaluate if you are able to report relevant and very precise information, including hardware configuration.pythagorasmk wrote:Is it possible to report this problem to Debian developers
I don't think it is easy to work on something difficult to reproduce.
However, you are not the only nvidia user, and we see so many glitch descriptions with nvidia, that I would be surprised if you don't find some similarities with other descriptions, and may be solutions (all linux distributions included).
I don't have any experience with Nvidia. I guess someone else can give at least some ideas for investigation.
You should may be try different linux liveCD to see if suspend feature works better, and investigate its configuration.