<div class="gmail_quote">On Mon, Oct 31, 2011 at 12:07 AM, Reinhard Tartler <<a href="mailto:siretart@ubuntu.com">siretart@ubuntu.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> <div class="im">On So, Okt 30, 2011 at 15:11:04 (CET), staticd wrote: >> Windows NT is designed so that, unless system security is already >> compromised in some other way, only the Winlogon process, a trusted >> system process, can receive notification of this keystroke >> combination. This is because the kernel remembers the process ID of >> the Winlogon process, and allows only that process to receive the >> notification. >> >> So says Wikipedia. >> >> Interestingly, VMWare catches the sequence as well. >> >> > I was thinking of a Alt+Sysrq combination capturable only by the kernel. > (Ctrl+Alt+Sysrq ?) </div>The SAK for Linux systems is Alt+Sysrq+k While this SAK can be disabled, Ubuntu ships with this functionality enabled. It safely and uncatchably terminates your running X11 session, returning back to your login manager. Cheers, Reinhard. -- Gruesse/greetings, Reinhard Tartler, KeyID 945348A4 -- Ubuntu-devel-discuss mailing list <a href="mailto:Ubuntu-devel-discuss@lists.ubuntu.com">Ubuntu-devel-discuss@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel-discuss" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel-discuss</a> </blockquote></div> Reinhard, doesn't pressing Alt+Sysrq+k kill the current X session? Is there a secure way of getting the login manager without disrupting other users who are also working in the background? (a switch user functionality that cannot be spoofed) Do you know how i could go about implementing this?