try using the real machine name -query machine-name when I used -query localhost on my decrepid redhat 6.2 it did not work are you sure xdmpc is working, can you use xdmcp in the normal fashion ???
are you using inetd ?? try "vncserver -query xxxx -once" and see what happens if using inetd try using 5900 nowait Stephen Bovy Computer Associates 6100 Center Drive Suite 700 Los Angeles, CA 90045 Tel: (310) 957-3930 Fax: (310) 957-3917 Mobile: (818) 352-9917 e-mail: [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Travis H. Sent: Tuesday, May 16, 2006 12:24 AM To: [email protected] Subject: $50 to someone who can make gdm + Xvnc a happy couple Hi, here's a summary: No matter what I do, I can't get Xvnc to talk XDMCP to gdm properly. On Fedora Core 3 or Fedora Core 5. I have tried everything I could think of, and some things I couldn't. Essentially, it's like gdm never sees the XDMCP stuff, but tcpdump on loopback shows they communicate on port 177... and that Xvnc has the last word. That's kind of odd, it seems like Xvnc is sending a query that gdm isn't responding to, so it hangs: 02:15:39.704214 IP 127.0.0.1.47658 > 127.0.0.1.xdmcp: UDP, length 7 02:15:39.711298 IP 127.0.0.1.xdmcp > 127.0.0.1.47658: UDP, length 69 02:15:39.735317 IP 127.0.0.1.47658 > 127.0.0.1.xdmcp: UDP, length 87 02:15:39.736879 IP 127.0.0.1.xdmcp > 127.0.0.1.47658: UDP, length 52 02:15:39.737216 IP 127.0.0.1.47658 > 127.0.0.1.xdmcp: UDP, length 29 That is, if I specify "-query localhost" to Xvnc, and then connect via vncviewer, it shows a watch icon for my mouse cursor. I can't get any debugging information out of either of them. I ran Xvnc under strace, and it was sleeping in select (with a timeout). No big surprises there. No clues either. During debugging, I added the following line to tcp.allow, (tcp.deny is empty), but it seems to have no effect (domain sanitized to protect the afflicted): gdm: .localdomain.com 127.0.0.1 I've tried rebuilding the RPM from source, downloading it again, and I don't think it's a problem with the binary. They say they only got blank screens with xdm and kdm too. They also say the same configuration _used_ to work, and that it just stopped suddenly (there's a few reboots around that time, so it was probably broken on-disk by an upgrade, while the old stuff was still resident until the reboot). I ran gdm under strace, and I've attached the output. To make it interesting, and to convince people to look at the attachment, I'll offer $50 to the first person who can give me the advice that fixes the problem. I _have_ read the archives, and I _have_ enabled the xdmcp features of gdm. None of the tips there got me up and running on either system. -- "Curiousity killed the cat, but for a while I was a suspect" -- Steven Wright Security Guru for Hire http://www.lightconsulting.com/~travis/ -><- GPG fingerprint: 9D3F 395A DAC5 5CCC 9066 151D 0A6B 4098 0C55 1484 [{fd=4, events=POLLIN|POLLPRI}, {fd=7, events=POLLIN|POLLPRI}, {fd=3, events=POLLIN|POLLPRI, revents=POLLIN}, {fd=5, events=POLLIN|POLLPRI}], 4, -1) = 1 gettimeofday({1147762529, 260377}, {300, 0}) = 0 recvfrom(3, "\0\1\0\2\0\1\0", 8192, 0, {sa_family=AF_INET, sin_port=htons(47645), sin_addr=inet_addr("127.0.0.1")}, [16]) = 7 time(NULL) = 1147762529 rt_sigaction(SIGTERM, {0x691096, [], SA_RESTART}, {0x6a1941, [], SA_RESTART}, 8) = 0 rt_sigaction(SIGINT, {0x691096, [], SA_RESTART}, {0x6a1941, [], SA_RESTART}, 8) = 0 rt_sigaction(SIGHUP, {0x691096, [], SA_RESTART}, {0x6a1941, [], SA_RESTART}, 8) = 0 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 open("/etc/hosts", O_RDONLY) = 8 fcntl64(8, F_GETFD) = 0 fcntl64(8, F_SETFD, FD_CLOEXEC) = 0 fstat64(8, {st_mode=S_IFREG|0640, st_size=697, ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7cfe000 read(8, "# Do not remove the following li"..., 4096) = 697 close(8) = 0 munmap(0xb7cfe000, 4096) = 0 rt_sigaction(SIGTERM, {0x6a1941, [], SA_RESTART}, NULL, 8) = 0 rt_sigaction(SIGINT, {0x6a1941, [], SA_RESTART}, NULL, 8) = 0 rt_sigaction(SIGHUP, {0x6a1941, [], SA_RESTART}, NULL, 8) = 0 time(NULL) = 1147762529 open("/etc/hosts.allow", O_RDONLY) = 8 fstat64(8, {st_mode=S_IFREG|0644, st_size=523, ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7cfe000 read(8, "#\n# hosts.allow\tThis file descri"..., 4096) = 523 read(8, "", 4096) = 0 close(8) = 0 munmap(0xb7cfe000, 4096) = 0 open("/etc/hosts.deny", O_RDONLY) = 8 fstat64(8, {st_mode=S_IFREG|0644, st_size=431, ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7cfe000 read(8, "#\n# hosts.deny\tThis file describ"..., 4096) = 431 read(8, "", 4096) = 0 close(8) = 0 munmap(0xb7cfe000, 4096) = 0 time(NULL) = 1147762529 access("/etc/X11/gdm/Xwilling", X_OK) = -1 ENOENT (No such file or directory) time(NULL) = 1147762529 sendto(3, "\0\1\0\5\0?\0\0\0\"hostname.fulldomain.co"..., 69, 0, {sa_family=AF_INET, sin_port=htons(47645), sin_addr=inet_addr("127.0.0.1")}, 16) = 69 poll([{fd=4, events=POLLIN|POLLPRI}, {fd=7, events=POLLIN|POLLPRI}, {fd=5, events=POLLIN|POLLPRI}, {fd=3, events=POLLIN|POLLPRI, revents=POLLIN}], 4, -1) = 1 gettimeofday({1147762529, 293100}, {300, 0}) = 0 recvfrom(3, "\0\1\0\7\0Q\0\2\1\0\0\1\0\4\300\250\1f\0\0\0\0\3\0\22M"..., 8192, 0, {sa_family=AF_INET, sin_port=htons(47645), sin_addr=inet_addr("127.0.0.1")}, [16]) = 87 time(NULL) = 1147762529 open("/etc/hosts.allow", O_RDONLY) = 8 fstat64(8, {st_mode=S_IFREG|0644, st_size=523, ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7cfe000 read(8, "#\n# hosts.allow\tThis file descri"..., 4096) = 523 read(8, "", 4096) = 0 close(8) = 0 munmap(0xb7cfe000, 4096) = 0 open("/etc/hosts.deny", O_RDONLY) = 8 fstat64(8, {st_mode=S_IFREG|0644, st_size=431, ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7cfe000 read(8, "#\n# hosts.deny\tThis file describ"..., 4096) = 431 read(8, "", 4096) = 0 close(8) = 0 munmap(0xb7cfe000, 4096) = 0 time(NULL) = 1147762529 time(NULL) = 1147762529 time(NULL) = 1147762529 close(10) = 0 kill(4893, SIGTERM) = 0 --- SIGCHLD (Child exited) @ 0 (0) --- sigreturn() = ? (mask now []) rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0 rt_sigaction(SIGCHLD, NULL, {0x6a1941, [CHLD], SA_RESTART|SA_NOCLDSTOP}, 8) = 0 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 nanosleep({10, 0}, {10, 0}) = 0 waitpid(4893, [{WIFEXITED(s) && WEXITSTATUS(s) == 4}], WNOHANG) = 4893 time(NULL) = 1147762539 umask(022) = 022 unlink("/var/gdm/localhost.localdomain:2.Xauth") = 0 open("/var/gdm/localhost.localdomain:2.Xauth", O_WRONLY|O_CREAT|O_TRUNC|O_EXCL|O_NOCTTY, 0644) = 8 fcntl64(8, F_GETFL) = 0x1 (flags O_WRONLY) fstat64(8, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7cfe000 _llseek(8, 0, [0], SEEK_CUR) = 0 gettimeofday({1147762539, 296968}, {300, 0}) = 0 getppid() = 4728 open("/dev/random", O_RDONLY|O_NONBLOCK|O_NOCTTY) = 10 select(11, [10], NULL, NULL, {0, 10000}) = 1 (in [10], left {0, 10000}) read(10, "\2%\214s\252d-\211\5\302\324\331\256\357.\27", 16) = 16 close(10) = 0 write(8, "\377\377\0\0\0\0012\0\22MIT-MAGIC-COOKIE-1\0\20A\262\27"..., 45) = 45 close(8) = 0 munmap(0xb7cfe000, 4096) = 0 sendto(3, "\0\1\0\10\0.\356cC\32\0\0\0\0\0\22MIT-MAGIC-COOKIE"..., 52, 0, {sa_family=AF_INET, sin_port=htons(47645), sin_addr=inet_addr("127.0.0.1")}, 16) = 52 poll([{fd=4, events=POLLIN|POLLPRI}, {fd=7, events=POLLIN|POLLPRI}, {fd=5, events=POLLIN|POLLPRI}, {fd=3, events=POLLIN|POLLPRI, revents=POLLIN}], 4, 0) = 1 gettimeofday({1147762539, 297709}, {300, 0}) = 0 waitpid(-1, 0xbf913624, WNOHANG) = 0 gettimeofday({1147762539, 297789}, {300, 0}) = 0 recvfrom(3, "\0\1\0\7\0Q\0\2\1\0\0\1\0\4\300\250\1f\0\0\0\0\3\0\22M"..., 8192, 0, {sa_family=AF_INET, sin_port=htons(47645), sin_addr=inet_addr("127.0.0.1")}, [16]) = 87 time(NULL) = 1147762539 open("/etc/hosts.allow", O_RDONLY) = 8 fstat64(8, {st_mode=S_IFREG|0644, st_size=523, ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7cfe000 read(8, "#\n# hosts.allow\tThis file descri"..., 4096) = 523 read(8, "", 4096) = 0 close(8) = 0 munmap(0xb7cfe000, 4096) = 0 open("/etc/hosts.deny", O_RDONLY) = 8 fstat64(8, {st_mode=S_IFREG|0644, st_size=431, ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7cfe000 read(8, "#\n# hosts.allow\tThis file descri"..., 4096) = 523 read(8, "", 4096) = 0 close(8) = 0 munmap(0xb7cfe000, 4096) = 0 open("/etc/hosts.deny", O_RDONLY) = 8 fstat64(8, {st_mode=S_IFREG|0644, st_size=431, ...}) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7cfe000 read(8, "#\n# hosts.deny\tThis file describ"..., 4096) = 431 read(8, "", 4096) = 0 close(8) = 0 munmap(0xb7cfe000, 4096) = 0 time(NULL) = 1147762539 time(NULL) = 1147762539 pipe([8, 10]) = 0 time(NULL) = 1147762539 time(NULL) = 1147762539 geteuid32() = 0 getegid32() = 0 geteuid32() = 0 getegid32() = 0 umask(0) = 022 mkdir("/tmp/.ICE-unix", 01777) = -1 EEXIST (File exists) lstat64("/tmp/.ICE-unix", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0 chown32("/tmp/.ICE-unix", 0, 0) = 0 chmod("/tmp/.ICE-unix", 01777) = 0 umask(022) = 0 umask(0) = 022 mkdir("/tmp/.X11-unix", 01777) = -1 EEXIST (File exists) lstat64("/tmp/.X11-unix", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0 chown32("/tmp/.X11-unix", 0, 0) = 0 chmod("/tmp/.X11-unix", 01777) = 0 umask(022) = 0 geteuid32() = 0 getegid32() = 0 time(NULL) = 1147762539 clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0xb7eff708) = 4913 close(8) = 0 poll([{fd=4, events=POLLIN|POLLPRI}, {fd=7, events=POLLIN|POLLPRI}, {fd=5, events=POLLIN|POLLPRI, revents=POLLIN}, {fd=3, events=POLLIN|POLLPRI}], 4, -1) = 1 read(5, "\nGREETPID 4913 4918\n", 4095) = 20 write(10, "A\n", 2) = 2 kill(4913, SIGUSR2) = 0 sched_yield() = 0 poll( And there it hangs. _______________________________________________ VNC-List mailing list [email protected] To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list _______________________________________________ VNC-List mailing list [email protected] To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list
