https://bugs.freedesktop.org/show_bug.cgi?id=81139
Priority: medium
Bug ID: 81139
Assignee: mesa-dev@lists.freedesktop.org
Summary: Rendering sometimes halts in waiting for back buffers
with dri3 & xwayland
Severity: normal
Classification: Unclassified
OS: All
Reporter: stu_...@126.com
Hardware: Other
Status: NEW
Version: unspecified
Component: GLX
Product: Mesa
Xwayland now uses dri3 & glamor as means of acceleration, but rendering
sometimes halts randomly in waiting for back buffers(See Bug 80963 in wayland).
glxgears (and probably programs rendering in single buffer) is affected.
Stacktrace when halted is listed below:
at glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
#0 0x00007ffff70bd800 in __poll_nocancel () from /usr/lib/libc.so.6
#1 0x00007ffff55fc992 in ?? () from /usr/lib/libxcb.so.1
#2 0x00007ffff55fddc9 in xcb_wait_for_special_event ()
from /usr/lib/libxcb.so.1
#3 0x00007ffff7bbc495 in dri3_find_back (c=0x605790, priv=0xa346e0)
at dri3_glx.c:1103
#4 0x00007ffff7bbc51b in dri3_get_buffer (driDrawable=0x6a48e0, format=4107,
buffer_type=dri3_buffer_back, loaderPrivate=0xa346e0) at dri3_glx.c:1127
#5 0x00007ffff7bbc92e in dri3_get_buffers (driDrawable=0x6a48e0, format=4107,
stamp=0x6a4910, loaderPrivate=0xa346e0, buffer_mask=1,
buffers=0x7fffffffe640) at dri3_glx.c:1274
#6 0x00007ffff3563c10 in intel_update_image_buffers (brw=0x7ffff7fd4040,
drawable=0x6a48e0) at brw_context.c:1395
#7 0x00007ffff3563436 in intel_update_renderbuffers (context=0x6a4020,
drawable=0x6a48e0) at brw_context.c:1087
#8 0x00007ffff35634cd in intel_prepare_render (brw=0x7ffff7fd4040)
at brw_context.c:1108
#9 0x00007ffff3556969 in brw_clear (ctx=0x7ffff7fd4040, mask=18)
at brw_clear.c:234
#10 0x00007ffff31b875e in _mesa_Clear (mask=16640) at main/clear.c:226
#11 0x00000000004027fa in draw () at gears.c:183
#12 0x00007ffff76b1ac4 in ?? () from /usr/lib/libglut.so.3
#13 0x00007ffff76b5329 in fgEnumWindows () from /usr/lib/libglut.so.3
#14 0x00007ffff76b207d in glutMainLoopEvent () from /usr/lib/libglut.so.3
#15 0x00007ffff76b28e5 in glutMainLoop () from /usr/lib/libglut.so.3
#16 0x00000000004031af in main (argc=1, argv=0x7fffffffeb78) at gears.c:405
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