Hi, I've just got to ask this, please forgive me if it is only marginally on-topic for this list. Back when I started using X11 (late 80's, Ultrix, X11R3), turning on save-unders and backing store was an essential performance tuning step, that drastically improved the perceived "speed" of the desktop (e.g. disappearing menus exposed the underlying window instantly, without it having to be re-drawn). I've used save-unders and backing store ever since. Which also means that ever since starting to use RH desktops I had to turn it on manually, by editing the X command line in [gx]dm.conf. All RH and FC desktops I've used so far disable backing store (and at the same time save-unders - the two seem to be inextricably linked) by default. Why is that so? I have to admit that with modern hardware the perceived speed-up is small and may even be entirely based on self-suggestion. However, I'd like to understand the pros and cons of turning on backing store with modern X servers and on modern hardware. Cheers Steffen.
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