06-02-2013, 11:44 AM
this isn't really hashcat related, it's more appropriate for the ubuntu forums, but i'll answer it anyway since i know the answer.
the issue is with the way xorg is detecting your monitor. your monitor probably does not report edid info, or if it does it must be reporting it incorrectly, which is causing xorg to select a mode that your monitor cannot handle.
the fix is to ssh in and hand-edit your xorg.conf to manually specify an appropriate modeline. you will need to calculate this yourself using the information found in your monitor's owner's manual.
this issue will not prevent you from running hashcat via ssh.
the issue is with the way xorg is detecting your monitor. your monitor probably does not report edid info, or if it does it must be reporting it incorrectly, which is causing xorg to select a mode that your monitor cannot handle.
the fix is to ssh in and hand-edit your xorg.conf to manually specify an appropriate modeline. you will need to calculate this yourself using the information found in your monitor's owner's manual.
this issue will not prevent you from running hashcat via ssh.