Date: Thu, 27 Sep 2018 10:59:58 +0200 From: Bengt Ahlgren <bengt.ahlgren@ri.se> To: Greg V <greg@unrelenting.technology> Cc: <x11@freebsd.org> Subject: Re: Where are framebuffers/visuals created? Message-ID: <uh7a7o3iacx.fsf@P142s.sics.se> In-Reply-To: <1537980676.66000.0@smtp.migadu.com> (Greg V.'s message of "Wed, 26 Sep 2018 19:51:16 %2B0300") References: <uh7o9ckqt96.fsf@P142s.sics.se> <1537980676.66000.0@smtp.migadu.com>
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Greg V <greg@unrelenting.technology> writes: > On Wed, Sep 26, 2018 at 4:32 PM, Bengt Ahlgren <bengt.ahlgren@ri.se> > wrote: >> I'd like to try to debug and find the cause of this issue with Kwin, >> but >> I don't know where in the graphics stack to start digging: >> >> https://mail.kde.org/pipermail/kde-freebsd/2018-April/027704.html >> >> In short, after an update of Mesa, Kwin complained about not finding >> the >> appropriate framebuffer, and refused doing compositing with opengl. >> >> So, my question is: where in the graphics stack are the >> framebuffers/visuals created? > > Looks like a somewhat common issue with KWin, people have had it with > > - Xinerama enabled on Nvidia: > https://bbs.archlinux.org/viewtopic.php?id=123715 > - Dual GPU laptops: https://bugs.kde.org/show_bug.cgi?id=323134 > > And this 32-bit requirement was dropped in KWin: > https://git.reviewboard.kde.org/r/126262/ > But that fix is probably only in Plasma5, not KDE4. (Time to drop > KDE4! ;)) Thanks for the pointer - I'll have a look at that fix! > Have you tried modesetting DDX (w/ glamor acceleration) instead of the > (terrible) intel DDX? > Just deleting the intel driver should accomplish that, but just in > case, manual xorg.conf config looks like: > > Section "Device" > Identifier "GPU" > Driver "modesetting" > Option "AccelMethod" "glamor" > EndSection Yes, I tried - no difference in this regard. The modsetting driver results in some artifacts, e.g. on window decorations, on my laptop (Intel Ironlake), so I'll stick with the Intel driver. Bengt
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