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[Jaap Crezee <jaap@xxxxxx>]

I have reinvestigate this issue. I have straced hugin and I am seeing
input events going into hugin. So this does not seem a windowmanager
bug?

14:29:22.514388 recvfrom(4, "\10\0\240\347\32\241`\0W\2\0\0^\1\0\2\0\0\0\0\260\tM\2\366"..., 4096, 0, NULL, NULL) = 96 <0.000030>
14:29:22.514510 recvfrom(4, 0x142e2e4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable) <0.000031>
14:29:22.514686 poll([{fd=4, events=POLLIN|POLLOUT}], 1, 4294967295) = 1 ([{fd=4, revents=POLLOUT}]) <0.000033>
14:29:22.514783 writev(4, [{"&\0\2\0E\1\0\2", 8}, {NULL, 0}, {"", 0}], 3) = 8 <0.000025>
14:29:22.514851 poll([{fd=4, events=POLLIN}], 1, 4294967295) = 1 ([{fd=4, revents=POLLIN}]) <0.002062>
14:29:22.516964 recvfrom(4, "\7\1\240\347\35\241`\0W\2\0\0;\1\0\2E\1\0\2\260\tM\2/"..., 4096, 0, NULL, NULL) = 128 <0.000027>
14:29:22.517042 poll([{fd=4, events=POLLIN}], 1, 4294967295) = 1 ([{fd=4, revents=POLLIN}]) <0.000022>
14:29:22.517106 recvfrom(4, "\1\1\241\347\0\0\0\0W\2\0\0^\1\0\2\260\tM\2\366\0z\1\0"..., 4096, 0, NULL, NULL) = 96 <0.000024>
14:29:22.517185 recvfrom(4, 0x142e2e4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable) <0.000014>
14:29:22.517352 poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=12, events=0}, {fd=11, events=POLLIN}], 4, 0) = 0 (Timeout) <0.000026>
14:29:22.517445 poll([{fd=4, events=POLLIN|POLLOUT}], 1, 4294967295) = 1 ([{fd=4, revents=POLLOUT}]) <0.000014>
14:29:22.517504 writev(4, [{"&\0\2\0;\1\0\2", 8}, {NULL, 0}, {"", 0}], 3) = 8 <0.000021>
14:29:22.517574 poll([{fd=4, events=POLLIN}], 1, 4294967295) = 1 ([{fd=4, revents=POLLIN}]) <0.006084>
14:29:22.523717 recvfrom(4, "\1\1\242\347\0\0\0\0W\2\0\0E\1\0\2\260\tM\2/\0024\2\0"..., 4096, 0, NULL, NULL) = 32 <0.000036>
14:29:22.523813 recvfrom(4, 0x142e2e4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable) <0.000033>
14:29:22.523903 recvfrom(4, 0x142e2e4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable) <0.000033>
14:29:22.524061 poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=12, events=0}, {fd=11, events=POLLIN}], 4, 0) = 0 (Timeout) <0.000035>
14:29:22.524163 poll([{fd=4, events=POLLIN|POLLOUT}], 1, 4294967295) = 1 ([{fd=4, revents=POLLOUT}]) <0.000020>
14:29:22.524228 writev(4, [{"&\0\2\0;\1\0\2", 8}, {NULL, 0}, {"", 0}], 3) = 8 <0.000021>
14:29:22.524294 poll([{fd=4, events=POLLIN}], 1, 4294967295) = 1 ([{fd=4, revents=POLLIN}]) <0.001659>
14:29:22.526006 recvfrom(4, "\1\1\243\347\0\0\0\0W\2\0\0E\1\0\2\260\tM\2/\0024\2\0"..., 4096, 0, NULL, NULL) = 32 <0.000036>
14:29:22.526101 recvfrom(4, 0x142e2e4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable) <0.000033>
14:29:22.526184 recvfrom(4, 0x142e2e4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable) <0.000027>
14:29:22.526314 poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=12, events=0}, {fd=11, events=POLLIN}], 4, 0) = 0 (Timeout) <0.000026>


But based on other reports here and elsewhere (googleing) this might still be a real issue.

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https://bugs.launchpad.net/bugs/797370

Title:
  in fast preview drag with left mouse impossible

Status in Hugin - Panorama Tools GUI:
  Won't Fix

Bug description:
  I use Hugin Pre-Release 2011.1.0, but this behaviour also existed in 2011.0.0. I use Archlinux. On three pc's this bug exists.
  When going to the 'Fast Preview panorama'-window and than the Move/Drag tab, it should be possible to drag the panorama with the left mouse button. This was ever possible in older versions, but not with the versions I use now. When trying to drag with the left mouse button to move the panorama, nothing happens. When trying to drag together with shift, also nothing happens. Right mouse button is doing what it has to do ('rotate' the image). 
  This is very annoying since I sometimes want to move single pictures or straighten the horizon, but I can't do that this way :(.

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