Backing Store not working in 8 Bit color depth with vesa driver

Doug Kuvaas doug.kuvaas at
Mon Sep 19 11:49:30 PDT 2011

On Mon, Sep 19, 2011 at 1:03 PM, Patrick O'Donnell <pao at> wrote:
>>Date: Mon, 19 Sep 2011 10:20:12 -0500
>>From: Doug Kuvaas <doug.kuvaas at>
>>I posted to this list earlier about not getting color in 8 bit depth
>>using the intel driver.  After some assistance I was able to get 8 bit
>>color to show in color.  However, now the backing store does not seem
>>to work, so the application I am attempting to run leaves blank areas
>>on the display whenever a menu or other window covers that area.
>>xdpyinfo does report that the backing store is on.
> We, too, ran afoul of this change.  I turns out, though, that X
> clients were never allowed to presume the server would provide backing
> store (or save unders).  Even if the server announced that it
> supported backing store, it was allowed, if resources became tight, to
> refuse to provide it for any window that asked.
> It sounds like the client you're attempting to run is presuming upon
> the backing store and is ignoring the expose events that are being
> generated.  This, unfortunately, is broken behavior.
>                - Patrick

I thought the -wm option was supposed to force all windows to use the
WhenMapped backing store?  Were you able to come up with a

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