How to show all template suggestions for a page without using Devel Themer? For some reason the Theme developer module doesn't work on my site (whenever i activate it and navigate on my site it just shows a white page with written "Jump to main content"), but all I want to know is which TPL files are being used to render my current page.   

I know that if i put print_r($variables["theme_hook_suggestions"]); in preprocess_html or preprocess_page functions (or any other preprocess function for what it matters) I'll be able to see the suggestions for the html.tpl.php and page.tpl.php files respectively, but i actually need to go deeper and see all the template suggestions that are being checked to render the current page.

Is there any way to do this without using the Theme developer module?
You can put this in your settings.php
$conf['theme_debug'] = true;

This outputs html comments on your page which will help you with debugging how the theme suggestions are selected.