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gnu emacs 21.4a-3 signal handler loop bug (involves X?)


From: Coleman, Michael
Subject: gnu emacs 21.4a-3 signal handler loop bug (involves X?)
Date: Mon, 6 Mar 2006 16:14:10 -0600

Hi,

I've been noticing an intermittent problem with GNU emacs lately.  About
once or twice a month, as I'm flipping desktops in Gnome, when emacs is
thus deiconified, it won't repaint, and becomes completely
nonresponsive.  Below, is some strace output.  It seems to be stuck in a
loop--something involving signals I'm guessing.  This has happened to me
maybe six times total now; upgrading to the latest Debian version of the
emacs package doesn't seem to help.  Any ideas?  Is anyone else seeing
this?

Regards,
Mike


gettimeofday({1141682782, 201615}, NULL) = 0
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 1000}}, NULL) =
0
sigreturn()                             = ? (mask now [IO])
futex(0xb7c9c1e0, FUTEX_WAIT, 2, NULL)  = -1 EINTR (Interrupted system
call)
--- SIGALRM (Alarm clock) @ 0 (0) ---
gettimeofday({1141682782, 205588}, NULL) = 0
gettimeofday({1141682782, 205687}, NULL) = 0
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 1000}}, NULL) =
0
sigreturn()                             = ? (mask now [IO])
futex(0xb7c9c1e0, FUTEX_WAIT, 2, NULL)  = -1 EINTR (Interrupted system
call)
--- SIGALRM (Alarm clock) @ 0 (0) ---
gettimeofday({1141682782, 209578}, NULL) = 0
gettimeofday({1141682782, 209670}, NULL) = 0
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 1000}}, NULL) =
0
sigreturn()                             = ? (mask now [IO])
futex(0xb7c9c1e0, FUTEX_WAIT, 2, NULL)  = -1 EINTR (Interrupted system
call)
--- SIGALRM (Alarm clock) @ 0 (0) ---
gettimeofday({1141682782, 697337}, NULL) = 0
gettimeofday({1141682782, 697427}, NULL) = 0
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 1000}}, NULL) =
0
sigreturn()                             = ? (mask now [IO])
futex(0xb7c9c1e0, FUTEX_WAIT, 2, NULL)  = -1 EINTR (Interrupted system
call)
--- SIGALRM (Alarm clock) @ 0 (0) ---
gettimeofday({1141682782, 719362}, NULL) = 0
gettimeofday({1141682782, 723328}, NULL) = 0
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 1000}}, NULL) =
0
sigreturn()                             = ? (mask now [IO])
futex(0xb7c9c1e0, FUTEX_WAIT, 2, NULL)  = -1 EINTR (Interrupted system
call)
--- SIGALRM (Alarm clock) @ 0 (0) ---
gettimeofday({1141682782, 735675}, NULL) = 0
gettimeofday({1141682782, 735813}, NULL) = 0
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 1000}}, NULL) =
0
sigreturn()                             = ? (mask now [IO])
futex(0xb7c9c1e0, FUTEX_WAIT, 2, NULL)  = -1 EINTR (Interrupted system
call)
--- SIGALRM (Alarm clock) @ 0 (0) ---
gettimeofday({1141682782, 739639}, NULL) = 0
gettimeofday({1141682782, 739756}, NULL) = 0
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 1000}}, NULL) =
0
sigreturn()                             = ? (mask now [IO])

address@hidden ldd /usr/bin/emacs21
        linux-gate.so.1 =>  (0xffffe000)
        libXaw3d.so.6 => /usr/X11R6/lib/libXaw3d.so.6 (0xb7f4d000)
        libXmu.so.6 => /usr/X11R6/lib/libXmu.so.6 (0xb7f37000)
        libXt.so.6 => /usr/X11R6/lib/libXt.so.6 (0xb7ee5000)
        libSM.so.6 => /usr/X11R6/lib/libSM.so.6 (0xb7edc000)
        libICE.so.6 => /usr/X11R6/lib/libICE.so.6 (0xb7ec5000)
        libXext.so.6 => /usr/X11R6/lib/libXext.so.6 (0xb7eb7000)
        libtiff.so.4 => /usr/lib/libtiff.so.4 (0xb7e54000)
        libjpeg.so.62 => /usr/lib/libjpeg.so.62 (0xb7e36000)
        libpng12.so.0 => /usr/lib/libpng12.so.0 (0xb7e10000)
        libz.so.1 => /usr/lib/libz.so.1 (0xb7dfe000)
        libm.so.6 => /lib/tls/libm.so.6 (0xb7dd8000)
        libungif.so.4 => /usr/lib/libungif.so.4 (0xb7dd0000)
        libXpm.so.4 => /usr/X11R6/lib/libXpm.so.4 (0xb7dc0000)
        libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0xb7cf9000)
        libncurses.so.5 => /lib/libncurses.so.5 (0xb7cb6000)
        libc.so.6 => /lib/tls/libc.so.6 (0xb7b7e000)
        /lib/ld-linux.so.2 (0xb7f99000)
        libdl.so.2 => /lib/tls/libdl.so.2 (0xb7b7a000)

address@hidden uname -a
Linux delta 2.6.12-1-686-smp #1 SMP Tue Sep 27 13:10:31 JST 2005 i686
GNU/Linux


Mike Coleman, Scientific Programmer, +1 816 926 4419
Stowers Institute for Biomedical Research
1000 E. 50th St., Kansas City, MO  64110




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