My peer's laptop turned off due to power failure while genymotion was running. Unfortunately, after restarting the Xubuntu 14.04 machine, genymotion stopped working. It always get stuck on the startup splash screen. I tried reinstalling genymotion and virtualbox several times, all in vain. Seems to be the problem with user authentication.
This is the log file:-
Feb 22 19:37:20 [Genymotion] [Debug] Proxy configuration: no proxy used
Feb 22 19:37:20 [Genymotion] [Warning] QSslSocket: cannot resolve SSLv2_client_method
Feb 22 19:37:20 [Genymotion] [Warning] QSslSocket: cannot resolve SSLv2_server_method
Feb 22 19:37:21 [Genymotion] [Warning] **** STARTING GENYMOTION ****
Feb 22 19:37:21 [Genymotion] [Warning] Genymotion Version: Genymotion 2.6.0
Feb 22 19:37:21 [Genymotion] [Debug] [LaunchpadApp] Started with ("./genymotion")
Feb 22 19:37:21 [Genymotion] [Debug] [doRequest] Requesting: "https://cloud.genymotion.com/launchpad/last_version/linux/x86/"
Feb 22 19:37:21 [Genymotion] [Debug] Getting currently authenticated user from local cache
Feb 22 19:37:24 [Genymotion] [Debug] [HttpRequest::exec] Request timeout (code: 0 ) : "/launchpad/last_version/linux/x86/"
Feb 22 19:37:24 [Genymotion] [Error] Network error while retrieving JSON content: 0
Feb 22 19:37:24 [Genymotion] [Error] [getGenymotionLastVersion] Bad request: "/launchpad/last_version/linux/x86/"
Feb 22 19:37:24 [Genymotion] [Error] Unable to get last Genymotion version number from server: 0
Feb 22 19:37:25 [Genymotion] [Warning] QIODevice::read: device not open
Feb 22 19:37:25 [Genymotion] [Debug] [doRequest] HTTP Status: 0
Feb 22 19:37:25 [Genymotion] [Debug] [doRequest] HTTP Content: ""
Feb 22 19:37:25 [Genymotion] [Debug] [doRequest] Reply error: "Operation canceled" ( 5 )
Feb 22 19:37:25 [Genymotion] [Debug] [doRequest] last error msg: "Invalid reply from server"
Feb 22 19:37:25 [Genymotion] [Debug] [login] Trying to authenticate "kaveri kumar"
Feb 22 19:37:25 [Genymotion] [Debug] Trying to logout user
Feb 22 19:37:25 [Genymotion] [Debug] [doRequest] Requesting: "https://cloud.genymotion.com/launchpad/login/"
Feb 22 19:37:26 [Genymotion] [Debug] [doRequest] done
Feb 22 19:37:26 [Genymotion] [Debug] [login] Login process result: 1
Feb 22 19:37:26 [Genymotion] [Debug] [login] User authenticated: "kaveri kumar"
And there's nothing more to it other than this.
EDIT- "kaveri kumar" is her user name for her genymotion account. I fail to understand even though I entered Yes while prompted to delete log files, her user name is still saved somewhere in the system.
The problem was I wasn't removing the configuration file in /home/.config/Genymobile. Removing that and other genymotion files and then reinstalling genymotion fixed the problem. Like I said in the question, the user name and password were still saved and they were probably causing the problem.