Date: Sat, 6 Oct 2018 14:02:18 +0100 From: Johannes Lundberg <johalun0@gmail.com> To: Greg V <greg@unrelenting.technology> Cc: theron.tarigo@gmail.com, freebsd-current <freebsd-current@freebsd.org>, x11-list freebsd <freebsd-x11@freebsd.org> Subject: Re: linux-c7 and opengl apps? Message-ID: <CAECmPwuqq69oyyqGM-ZNkJt4xy7_q5b4T9uxGftF91x_wk=5xw@mail.gmail.com> In-Reply-To: <1538829480.11691.0@smtp.migadu.com> References: <CAECmPwvjJWNFELoeMcxGNFi_oXS5hWE4D2tTxi0TJpwBOriOrQ@mail.gmail.com> <dbff419a-b104-fb60-d0b3-0eecd7dbd0d1@gmail.com> <1538829480.11691.0@smtp.migadu.com>
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On Sat, Oct 6, 2018 at 1:39 PM Greg V <greg@unrelenting.technology> wrote: > > > On Fri, Oct 5, 2018 at 11:21 PM, Theron <theron.tarigo@gmail.com> wrote: > > % /compat/linux/opt/VirtualGL/bin/glxinfo | grep OpenGL > > libGL error: MESA-LOADER: failed to retrieve device information > > Do you have linsysfs mounted? > > Try reading /compat/linux/sys/class/drm/card0/device/uevent. > > Mesa won't retrieve device information without linsysfs. > I wrote the linsysfs patch that exposed the info there so that recent > Mesa would work :) > https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D222375 > (Wow, that was a year ago=E2=80=A6 interesting note from there: you might > need to set LIBGL_DRI3_DISABLE=3D1 for Linux apps) > Thank you Greg! LIBGL_DRI3_DISABLE=3D1 was it for me! Now I can run OpenGL apps with linux-c7 :) > > Also, what's with the "/opt/VirtualGL"? Are you using mesa from > linux-c7 or something=E2=80=A6 weird? > > > This problem has existed forever. I am not sure it is actually a > > fault in Linux emulation, as these very same symptoms ("failed to > > retrieve device information" message, console freeze) existed back in > > FreeBSDDesktop/freebsd-base-graphics days when attempting to run > > purely FreeBSD OpenGL apps. At the time the workaround was a patch > > to Mesa's GPU detection; the underlying kernel problem wasn't > > addressed. > > There was a somewhat related issue (but not the same one, FreeBSD and > Linux versions of mesa/libdrm use different mechanisms to get device > info). > Mostly affected Wayland-EGL clients =E2=80=94 they would try to access > /dev/dri/card408 instead of /dev/dri/card0, fail to get info and fall > back to software rendering. > I fixed it a while ago: > > https://gitlab.freedesktop.org/mesa/mesa/commit/db8519a369261cdedda50852f= acc45616d4eba28 > > But I never saw console freezes when Mesa couldn't properly detect the > GPU o_0 > > _______________________________________________ > freebsd-current@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org= " >
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