Date: Sat, 06 Oct 2018 15:38:00 +0300 From: Greg V <greg@unrelenting.technology> To: Theron <theron.tarigo@gmail.com> Cc: FreeBSD Current <freebsd-current@freebsd.org>, x11-list freebsd <freebsd-x11@freebsd.org> Subject: Re: linux-c7 and opengl apps? Message-ID: <1538829480.11691.0@smtp.migadu.com> In-Reply-To: <dbff419a-b104-fb60-d0b3-0eecd7dbd0d1@gmail.com> References: <CAECmPwvjJWNFELoeMcxGNFi_oXS5hWE4D2tTxi0TJpwBOriOrQ@mail.gmail.com> <dbff419a-b104-fb60-d0b3-0eecd7dbd0d1@gmail.com>
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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=222375 (Wow, that was a year ago… interesting note from there: you might need to set LIBGL_DRI3_DISABLE=1 for Linux apps) Also, what's with the "/opt/VirtualGL"? Are you using mesa from linux-c7 or something… 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 — 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/db8519a369261cdedda50852facc45616d4eba28 But I never saw console freezes when Mesa couldn't properly detect the GPU o_0
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