Date: Tue, 13 Jan 2026 01:51:49 +0000 From: bugzilla-noreply@freebsd.org To: gnome@FreeBSD.org Subject: [Bug 287078] multimedia/cheese: fails to show images/video for a working webcam Message-ID: <bug-287078-6497-CJvYtt7ENb@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-287078-6497@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=287078 Marcin Cieślak <saper@saper.info> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |saper@saper.info --- Comment #2 from Marcin Cieślak <saper@saper.info> --- I have traced this down in the userspace (gdb) bt #0 gst_v4l2_allocator_alloc_dmabuf (allocator=0x801029210 [GstV4l2Allocator|v4l2src0:pool0:src:allocator], dmabuf_allocator=0x802c1d190 [GstAllocator|dmabufallocator2]) at ../sys/v4l2/gstv4l2allocator.c:916 #1 0x0000000800d1ddae in gst_v4l2_buffer_pool_alloc_buffer (bpool=0x802c4f0a0 [GstBufferPool|v4l2src0:pool0:src], buffer=0x7fffdf9fa8e0, params=0x0) at ../sys/v4l2/gstv4l2bufferpool.c:473 #2 0x0000000800301f4a in do_alloc_buffer (pool=0x802c4f0a0 [GstBufferPool|v4l2src0:pool0:src], buffer=0x7fffdf9fa8e0, params=0x0) at ../gst/gstbufferpool.c:284 #3 0x00000008003013e5 in default_start (pool=0x802c4f0a0 [GstBufferPool|v4l2src0:pool0:src]) at ../gst/gstbufferpool.c:336 #4 0x0000000800d1cfd1 in gst_v4l2_buffer_pool_start (bpool=0x802c4f0a0 [GstBufferPool|v4l2src0:pool0:src]) at ../sys/v4l2/gstv4l2bufferpool.c:960 #5 0x00000008002ffa18 in do_start (pool=0x802c4f0a0 [GstBufferPool|v4l2src0:pool0:src]) at ../gst/gstbufferpool.c:369 #6 0x00000008002ff6ff in gst_buffer_pool_set_active (pool=0x802c4f0a0 [GstBufferPool|v4l2src0:pool0:src], active=1) at ../gst/gstbufferpool.c:514 #7 0x0000000800d233de in gst_v4l2src_decide_allocation (bsrc=0x8018974e0 [GstBaseSrc|v4l2src0], query=0x802c050f0) at ../sys/v4l2/gstv4l2src.c:947 #8 0x0000000801afc9d9 in gst_base_src_prepare_allocation (basesrc=0x8018974e0 [GstBaseSrc|v4l2src0], caps=0x802c05190) at ../libs/gst/base/gstbasesrc.c:3380 #9 0x0000000801af2a71 in gst_base_src_negotiate_unlocked (basesrc=0x8018974e0 [GstBaseSrc|v4l2src0]) at ../libs/gst/base/gstbasesrc.c:3518 #10 0x0000000801af7eb9 in gst_base_src_loop (pad=0x80107ecc0 [GstPad|src]) at ../libs/gst/base/gstbasesrc.c:2920 #11 0x00000008003acf3d in gst_task_func (task=0x8011e2ed0 [GstTask|v4l2src0:src]) at ../gst/gsttask.c:399 #12 0x00000008003adc5a in default_func (tdata=0x801893140, pool=0x801167c80 [GstTaskPool|taskpool0]) at ../gst/gsttaskpool.c:70 #13 0x000000080051d918 in ??? () at /usr/local/lib/libglib-2.0.so.0 #14 0x000000080051bb95 in ??? () at /usr/local/lib/libglib-2.0.so.0 #15 0x00000008005faecb in thread_start (curthread=0x800dee010) at /usr/src/lib/libthr/thread/thr_create.c:299 #16 0x0000000000000000 in ??? () (gdb) list 909 908 if (group->mem[i] == NULL) { 909 struct v4l2_exportbuffer expbuf = { 0 }; 910 911 expbuf.type = obj->type; 912 expbuf.index = group->buffer.index; 913 expbuf.plane = i; (gdb) 914 expbuf.flags = O_CLOEXEC | O_RDWR; 915 916 if (obj->ioctl (obj->video_fd, VIDIOC_EXPBUF, &expbuf) < 0) 917 goto expbuf_failed; (gdb) p expbuf $3 = {type = 1, index = 0, plane = 0, flags = 1048578, fd = 0, reserved = {0 <repeats 11 times>}} The VIDIOC_EXPBUF ioctl will fail (I think with EINVAL) -- You are receiving this mail because: You are the assignee for the bug.home | help
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