[Mesa-dev] [Bug 109560] Sometimes VLC player process gets stuck in memory after closure if video output used is Auto or OpenGL

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109560

--- Comment #6 from Michel Dänzer <michel at daenzer.net> ---
I was able to reproduce this, below is a better backtrace of the hanging
thread. Looks like it's waiting for a Present idle event. Not sure yet if this
Mesa's fault (maybe it missed the event while the context wasn't current), or
maybe the X server failed to send an event when it should (e.g. because the
window was unmapped). Most likely not an XCB issue though.

Thread 16 (Thread 0x7f697df1f700 (LWP 9784)):
#0  0x00007f69ec60eb69 in __GI___poll (fds=0x7f697df1e508, nfds=1, timeout=-1)
at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f69e8c64cf7 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f69e8c66a0a in xcb_wait_for_special_event () at
/usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f69e1088bf5 in dri3_wait_for_event_locked (draw=0x7f697432bf98) at
../src/loader/loader_dri3_helper.c:545
#4  0x00007f69e1088bf5 in dri3_wait_for_event_locked (draw=0x7f697432bf98) at
../src/loader/loader_dri3_helper.c:529
#5  0x00007f69e1088ef7 in dri3_find_back (draw=draw at entry=0x7f697432bf98) at
../src/loader/loader_dri3_helper.c:670
#6  0x00007f69e1089666 in dri3_get_buffer (format=format at entry=4098,
buffer_type=buffer_type at entry=loader_dri3_buffer_back,
draw=draw at entry=0x7f697432bf98, driDrawable=<optimized out>) at
../src/loader/loader_dri3_helper.c:1800
#7  0x00007f69e108a590 in loader_dri3_get_buffers (driDrawable=<optimized out>,
format=4098, stamp=0x7f697431f5a0, loaderPrivate=0x7f697432bf98,
buffer_mask=<optimized out>, buffers=0x7f697df1e830) at
../src/loader/loader_dri3_helper.c:2019
#8  0x00007f69c4e03de0 in dri_image_drawable_get_buffers
(statts_count=<optimized out>, statts=<optimized out>, images=<optimized out>,
drawable=<optimized out>) at ../src/gallium/state_trackers/dri/dri2.c:339
#9  0x00007f69c4e03de0 in dri2_allocate_textures (ctx=0x7f697431f950,
drawable=0x7f697431f5a0, statts=0x7f69740504a0, statts_count=1) at
../src/gallium/state_trackers/dri/dri2.c:466
#10 0x00007f69c4e05f72 in dri_st_framebuffer_validate (stctx=<optimized out>,
stfbi=<optimized out>, statts=0x7f69740504a0, count=1, out=0x7f697df1e9a0) at
../src/gallium/state_trackers/dri/dri_drawable.c:85
#11 0x00007f69c5196117 in st_framebuffer_validate (stfb=0x7f697404ffd0,
st=st at entry=0x7f697404a920) at ../src/mesa/state_tracker/st_manager.c:222
#12 0x00007f69c5196456 in st_api_make_current (stapi=<optimized out>,
stctxi=0x7f697404a920, stdrawi=0x7f697431f5a0, streadi=0x7f697431f5a0) at
../src/mesa/state_tracker/st_manager.c:1082
#13 0x00007f69c4e059cd in dri_make_current (cPriv=<optimized out>,
driDrawPriv=<optimized out>, driReadPriv=<optimized out>) at
../src/gallium/state_trackers/dri/dri_context.c:301
#14 0x00007f69c4dffe54 in driBindContext (pcp=<optimized out>, pdp=<optimized
out>, prp=<optimized out>) at ../src/mesa/drivers/dri/common/dri_util.c:579
#15 0x00007f69e107e546 in dri3_bind_context (context=0x7f697431f7b0,
old=<optimized out>, draw=88080385, read=88080385) at ../src/glx/dri3_glx.c:210
#16 0x00007f69e106a684 in MakeContextCurrent (dpy=0x7f6974150740,
draw=88080385, read=88080385, gc_user=0x7f697431f7b0) at
../src/glx/glxcurrent.c:220
#17 0x00007f697daa936b in  () at
/usr/lib/x86_64-linux-gnu/vlc/plugins/video_output/libglx_plugin.so
#18 0x00007f697de14632 in  () at
/usr/lib/x86_64-linux-gnu/vlc/plugins/video_output/libgl_plugin.so
#19 0x00007f69ec44111e in vlc_module_unload () at
/usr/lib/x86_64-linux-gnu/libvlccore.so.9
#20 0x00007f69ec490e6d in  () at /usr/lib/x86_64-linux-gnu/libvlccore.so.9
#21 0x00007f69ec4a115c in  () at /usr/lib/x86_64-linux-gnu/libvlccore.so.9
#22 0x00007f69ec494506 in  () at /usr/lib/x86_64-linux-gnu/libvlccore.so.9
#23 0x00007f69ec495dea in  () at /usr/lib/x86_64-linux-gnu/libvlccore.so.9
#24 0x00007f69ec6f7fa3 in start_thread (arg=<optimized out>) at
pthread_create.c:486
#25 0x00007f69ec61982f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95

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