installation hang in clock_gettime if connected to net and download of updates checked

[Fabio Marconi]

Strace of ubiquity 2.11.9>
[pid 7853] 18:52:08.861269 poll([{fd=9, events=POLLIN}, {fd=10, events=POLLIN}, {fd=19, events=POLLIN}, {fd=7, events=POLLIN}, {fd=16, events=POLLIN}, {fd=5, events=POLLIN}, {fd=6, events=POLLIN}], 7, 500) = 1 ([{fd=10, revents=POLLIN}])
[pid 7853] 18:52:08.865769 recvfrom(10, "#\215\24\37\32\0\0\0\6\0\2\0L\333\26\0\0\0\0\0\243\1\0\0\257\0\340\3\0\0\0\0"..., 4096, 0, NULL, NULL) = 136
[pid 7853] 18:52:08.865942 recvfrom(10, 0x28563e4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
[pid 7853] 18:52:08.866047 clock_gettime(CLOCK_MONOTONIC, {1497, 933176587}) = 0
[pid 7853] 18:52:08.866492 clock_gettime(CLOCK_MONOTONIC, {1497, 933695647}) = 0
[pid 7853] 18:52:08.866702 recvfrom(10, 0x28563e4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)

Hallo
Installer start as usual, I can choose the language (english) and click Next, the computer is already connected to the net, I check the two checkbox for the updates and the third party software and click continue, the button is oranged, the pointer is spinning, but nothing more.
It download the requested softwares and hang in that loop without exit.
The system still usable.
After 30 inutes I stop the installer
Thanks
Fabio

**Update**
When it has completed all the downloads, if we restart Ubiquity, it will work.

ProblemType: BugDistroRelease: Ubuntu 12.10
Package: ubiquity 2.11.8 - 2.11.12
ProcVersionSignature: Ubuntu 3.5.0-3.3-generic 3.5.0-rc5
Uname: Linux 3.5.0-3-generic x86_64
ApportVersion: 2.2.5-0ubuntu2
Architecture: amd64
CasperVersion: 1.319
Date: Wed Jul 4 15:38:09 2012
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquityLiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120704)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bashSourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1020992

[Fabio Marconi (fabiomarconi)]

/var/log/installer/debug of ubiquity 2.11.9

[Fabio Marconi (fabiomarconi)]

strace of ubiquity 2.11.9

[Fabio Marconi (fabiomarconi)]

strace of ubiquity-2.11.12

[Brian Murray (brian-murray)]

This looks rather odd:

Jul 4 15:30:52 ubuntu ubiquity: debconf: unable to initialize frontend: Dialog
Jul 4 15:30:52 ubuntu ubiquity: debconf: (Dialog frontend will not work on a dumb terminal, an emacs shell buffer, or without a controlling terminal.)
Jul 4 15:30:52 ubuntu ubiquity: debconf: falling back to frontend: Readline
Jul 4 15:30:52 ubuntu ubiquity: debconf: unable to initialize frontend: Readline
Jul 4 15:30:52 ubuntu ubiquity: debconf: (This frontend requires a controlling tty.)
Jul 4 15:30:52 ubuntu ubiquity: debconf: falling back to frontend: Teletype
Jul 4 15:30:52 ubuntu ubiquity: dpkg-preconfigure: unable to re-open stdin: