On Wed 13 May 2009 at 21:10:53 +0200, Rhialto wrote:
> And indeed, that fixed it! Really weird. I want to try to find which
> option makes the difference... but I don't have time for that now :-(

Returning to my previous problem: it is indeed the backing store option
that causes the problem. To be precise:

Section "Device"
# Backingstore causes ctwm to misbehave; it looks mostly like it is
# expecting backing store to work when it doesn't. Various things
# are not re-painted on exposure.
# The option isn't documented in Xorg(1) or savage(1), but it is
# recognised by the server, judged by this but in Xorg.log:
# (**) SAVAGE(0): Option "BackingStore"
# (**) SAVAGE(0): Backing store enabled
    #Option "Backingstore"

        Identifier  "Card0"
        Driver      "savage"
        VendorName  "S3 Inc."
        BoardName   "VT8636A [ProSavage KN133] AGP4X VGA Controller (TwisterK)"
        BusID       "PCI:1:0:0"
EndSection

Today I updated my main machine, and I saw the same problem. The
solution was also the same. Finally I tried putting in the Backingstore
option, and the problem reappeared.

Some googling suggests that it is a sort-of-known problem:
http://www.nvnews.net/vbulletin/showthread.php?t=125433

"KDE4 crashes : Option BackingStore must be false with Xorg 1.5
Hi,

For people experiencing crashes in KDE4 (e.g. clicking on a konsole
menu), check in your xorg.conf file your options. If you have:

Option "BackingStore" "true"

then this option is known to lead to crashes with Xorg 1.5.
Put it to "false", it solved the crashes for me."

Shoddy linux-quality programming. Backing store is supposed to work!

-Olaf.
-- 
___ Olaf 'Rhialto' Seibert    -- You author it, and I'll reader it.
\X/ rhialto/at/xs4all.nl      -- Cetero censeo "authored" delendum esse.

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