On 22 June 2015 at 13:33, Ed Greshko <ed.greshko@greshko.com> wrote:
On 06/22/15 17:39, Patrick O'Callaghan wrote:
> This morning I updated my F22 system (only stable Fedora repos), which
> included multiple Kf5 packages. After rebooting, I find that window
> redraws are frequently messed up. This happens both on switching
> desktops and simply raising a window on an existing desktop.
> Occasionally the switching process leaves traces of the previous
> desktop on the new one, and windows are only partially redrawn. Both
> switching and raising are accompanied by rapid flashing between the old
> and new states for a fraction of a second before settling down.
>
> I have an Nvidia graphics card, using the Nouveau driver.

I have a fully updated F22 system also with an nVidia card but I'm running the nVidia driver via rpmfusion.  No problems like you describe.  GeForce GTX 660 is my card.

Mine's a GT630, nothing special. Ironically, I had switched to Nouveau a month or so ago because I had a problem with the Nvidia driver (system couldn't start X11 for some reason). I switched back and problem solved, so it looks like a Nouveau/Plasma issue.
 
> AFAIK Kwin was not one of the updated packages. I used to be able to
> look at /var/log/yum.log or run "yum history" to check, but dnf has
> changed all that though no doubt it's still possible somehow (the dnf
> manual is a model of obscurity on this point).

Well if you update via dnf there is a dnf.log.  If you do your updates via the apper systray icon I have no idea where the logs are....and I asked here and got no response.

dnf.log is quite different from the old yum.log. With the latter you had a simple time-sequence of install/update/remove actions. With the latter you have some internal logging data of no interest to the average user. There is a way to get approximately what I wanted ("dnf history info <number>", where <number> comes from a list of transactions produced by "dnf history", i.e. two commands to get more information than I really care about).

poc