[Bug 33738] New: PageFlip urxvt/xterm screen corruptions

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=33738

           Summary: PageFlip urxvt/xterm screen corruptions
           Product: xorg
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: krzysztof.krakowiak at gmail.com
         QAContact: xorg-team at lists.x.org


Created an attachment (id=42732)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=42732)
Screenshot of  xterm corruption after running quake3

I get urxvt/xterm after several runnings of fullscreen GL apps when PageFlip is
enabled. I am testing it usually using quake3, but it was very annoying when
appeared after some xscreensavers and I had to run xfce Terminal or restart
Xorg(killing many apps/webbrowser).
This bug probably appeared after adding real PageFlip to xf86-video-ati. Using
system xorg-driver-video-ati-6.13.2-3.x86_64 resolves the problem(but probably
its not real PageFlip, but buffer-copying). Disabling ColorTiling reduces bug
appearance(probably), but the only solution with xf86-video-ati from master, is
to explicitly disable PageFlip, or use UMS. Using system/gallium/mesa libGL
doesnt change anything, only ddx/PageFlip matters.

ArtiFacts appears mostly in and around xterm/urxvt(text is totally
smashed/unreadable), but other apps like gnome/xfce Terminals, WebKit/Gecko and
others webbrowsers are very little affected and still fully usable.

I am using PLD Th (2.99/3.0) with 64bit kernel/userspace(multilib) on 15" IBM
ThinkPad T60p UXGA(1600x1200) FlexView with FireGL 5200(r500/Radeon X1600),
core2duo T7200 and 4GB RAM, nearly identical to airlied one(except he's not
64bit capable), and I didnt tested 32bit. But maybe somebody else got 64bit
system and r500.

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