Comment 1 for bug 826263

Как выяснилось, в репозитории плагин версии 0.9.6.8 и для него параметры запуска немного другие

[uwsgi]
rack = true
socket = :3031
uid = redmine
master = true
processes = 2
chdir = /home/redmine/redmine-1.2.1/
post-buffering = 4096
env = RAILS_ENV=production

При таких настройках uWSGI начинает понимать uwsgi_modifier1 7; но работать все еще отказывается - пишет в лог:

Sun Aug 14 19:33:55 2011 - [uWSGI] getting INI configuration from
/etc/uwsgi-python/apps-enabled/redmine.ini
Sun Aug 14 19:33:55 2011 - *** Starting uWSGI 0.9.6.8 (64bit) ***
Sun Aug 14 19:33:55 2011 - compiled with version: 4.4.3
Sun Aug 14 19:33:55 2011 - Python version: 2.6.5 (r265:79063, Apr 162010, 14:15:55) [GCC 4.4.3]
Sun Aug 14 19:33:55 2011 - writing pidfile to /var/run/uwsgi-python/redmine/pid
Sun Aug 14 19:33:55 2011 - uWSGI running as root, you can use--uid/--gid/--chroot options
Sun Aug 14 19:33:55 2011 - setgid() to 33
Sun Aug 14 19:33:55 2011 - setuid() to 1001
Sun Aug 14 19:33:55 2011 - your memory page size is 4096 bytes
Sun Aug 14 19:33:55 2011 - allocated 648 bytes (0 KB) for 1 request's buffer.
Sun Aug 14 19:33:55 2011 - binding on TCP port: 3031
Sun Aug 14 19:33:55 2011 - your server socket listen backlog is limited to 100 connections
Sun Aug 14 19:33:55 2011 - initializing hooks...Sun Aug 14 19:33:55 2011 - done.
Sun Aug 14 19:33:55 2011 - chdir(): No such file or directory [plugins/rack/rack_plugin.c line 150]
Storing outgoing emails configuration in config/email.yml is deprecated. You should now store it in config/configuration.yml using the email_delivery setting.
Sun Aug 14 19:34:11 2011 - ruby ready
Sun Aug 14 19:34:11 2011 - OK 0x7f1f8e904200
Sun Aug 14 19:34:11 2011 - spawned uWSGI master process (pid: 28971)
Sun Aug 14 19:34:11 2011 - max_ovec = 0
Sun Aug 14 19:34:11 2011 - spawned uWSGI worker 1 (pid: 28989)
Sun Aug 14 19:34:11 2011 - spawned uWSGI worker 2 (pid: 28990)

при обращении к странице

[pid: 28989|app: -1|req: -1/1] 95.26.156.153 () {42 vars in 925 bytes} [Sun Aug 14 19:34:25 2011] GET / => generated 46 bytes in 0 msecs (HTTP/1.1 500) 2 headers in 63 bytes (0 async switches on async core 0)

но вместо ответа отображает

uWSGI Error
wsgi application not found

Продолжу изыскания