I use this theme https://www.yootheme.com/themes/downloads/load?id=393&token=0e8856a7&format=raw and find the comments.php in wp-content/themes/yoo_master/warp/systems/wordpress/layouts/comments.php
change this:
<?php else : ?>
<form class="short" action="<?php echo get_option('siteurl'); ?>/wp-comments-post.php" method="post">
<?php if (is_user_logged_in()) : ?>
<?php global $user_identity; ?>
<p class="user"><?php printf(__('Logged in as <a href="%s">%s</a>.', 'warp'), get_option('siteurl').'/wp-admin/profile.php', $user_identity); ?> <a href="<?php echo wp_logout_url(get_permalink()); ?>" title="<?php _e('Log out of this account', 'warp'); ?>"><?php _e('Log out »', 'warp'); ?></a></p>
<?php else : ?>
<?php $req = get_option('require_name_email');?>
<div class="author <?php if ($req) echo "required"; ?>">
<input type="text" name="author" placeholder="<?php _e('Name', 'warp'); ?> <?php if ($req) echo "*"; ?>" value="<?php echo esc_attr($comment_author); ?>" size="22" <?php if ($req) echo "aria-required='true'"; ?> />
</div>
<div class="email <?php if ($req) echo "required"; ?>">
<input type="text" name="email" placeholder="<?php _e('E-mail', 'warp'); ?> <?php if ($req) echo "*"; ?>" value="<?php echo esc_attr($comment_author_email); ?>" size="22" <?php if ($req) echo "aria-required='true'"; ?> />
</div>
<div class="url">
<input type="text" name="url" placeholder="<?php _e('Website', 'warp'); ?>" value="<?php echo esc_attr($comment_author_url); ?>" size="22" />
</div>
<?php endif; ?>
<div class="content">
<textarea name="comment" id="comment" cols="58" rows="10" tabindex="4"></textarea>
</div>
<div class="actions">
<input name="submit" type="submit" id="submit" tabindex="5" value="<?php _e('Submit Comment', 'warp'); ?>" />
<?php comment_id_fields(); ?>
</div>
<?php do_action('comment_form', $post->ID); ?>
</form>
<?php endif; ?>
Then i add the hooks in like so:
<?php else :
do_action('comment_form_before'); ?>
<form class="short" action="<?php echo get_option('siteurl'); ?>/wp-comments-post.php" method="post">
<?php if (is_user_logged_in()) : ?>
<?php global $user_identity; ?>
<p class="user"><?php printf(__('Logged in as <a href="%s">%s</a>.', 'warp'), get_option('siteurl').'/wp-admin/profile.php', $user_identity); ?> <a href="<?php echo wp_logout_url(get_permalink()); ?>" title="<?php _e('Log out of this account', 'warp'); ?>"><?php _e('Log out »', 'warp'); ?></a></p>
<?php else : ?>
<?php $req = get_option('require_name_email');?>
<div class="author <?php if ($req) echo "required"; ?>">
<input type="text" name="author" placeholder="<?php _e('Name', 'warp'); ?> <?php if ($req) echo "*"; ?>" value="<?php echo esc_attr($comment_author); ?>" size="22" <?php if ($req) echo "aria-required='true'"; ?> />
</div>
<div class="email <?php if ($req) echo "required"; ?>">
<input type="text" name="email" placeholder="<?php _e('E-mail', 'warp'); ?> <?php if ($req) echo "*"; ?>" value="<?php echo esc_attr($comment_author_email); ?>" size="22" <?php if ($req) echo "aria-required='true'"; ?> />
</div>
<div class="url">
<input type="text" name="url" placeholder="<?php _e('Website', 'warp'); ?>" value="<?php echo esc_attr($comment_author_url); ?>" size="22" />
</div>
<?php endif; ?>
<div class="content">
<textarea name="comment" id="comment" cols="58" rows="10" tabindex="4"></textarea>
</div>
<div class="actions">
<input name="submit" type="submit" id="submit" tabindex="5" value="<?php _e('Submit Comment', 'warp'); ?>" />
<?php comment_id_fields(); ?>
</div>
<?php do_action('comment_form', $post->ID); ?>
</form>
<?php do_action('comment_form_after');
endif; ?>
everything works fine, but when i disable the WP comments, facebook comments also disappear.