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List:       kde-bugs-dist
Subject:    [neon] [Bug 365678] Massive flicker and repaint problems with Neon 5.7 on remote X
From:       Jan-Marek Glogowski via KDE Bugzilla <bugzilla_noreply () kde ! org>
Date:       2016-07-31 19:09:44
Message-ID: bug-365678-17878-cmkVfoHdJ2 () http ! bugs ! kde ! org/
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https://bugs.kde.org/show_bug.cgi?id=365678

--- Comment #12 from Jan-Marek Glogowski <glogow@fbihome.de> ---
I had some more of these problems, but it's still not reproducible. My feeling
is it's always at the end of the day, which might suggest leaking resources in
the radeon driver. I don't really know, how to debug this.

As you can see in the xsession-errors log, it contains a lot of 

> radeon: The kernel rejected CS, see dmesg for more information.

so the kernel driver rejected the command stream from the Xorg driver, which
matches the entries in the dmesg, literally thousand of lines of

[40490.073706] radeon 0000:01:00.0: r600_check_texture_resource:1566 tex pitch
(1752, 0x40, 1) invalid
[40490.073763] [drm:radeon_cs_ioctl [radeon]] *ERROR* Invalid command stream !

in a few seconds / a minute. Now an application shouldn't be able to create a
broken command stream. This looks more like a problem deeper in the stack. I'm
not sure I remembered the right key combo, but any keys I hit didn't change 
the settings (I finally created a physical note, so I can active lookup the
no-compositor-combo).

I have access to other HW, but that's not my working system. Other people here
running KDE5 with Intel HW (on Arch AFAIK) don't have this problem.

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