You have been subscribed to a public bug:
Binary package hint: phpmyadmin
It seem the current phpmyadmin package gives wrong permission on
/etc/phpmyadmin/config-db.php
sudo apt-get remove --purge phpmyadmin
sudo apt-get install phpmyadmin
Then http://myhost/phpmyadmin shows a white page.
Public bug reported:
Binary package hint: phpmyadmin
It seem the current phpmyadmin package gives wrong permission on
/etc/phpmyadmin/config-db.php
sudo apt-get remove --purge phpmyadmin
sudo apt-get install phpmyadmin
Then http://myhost/phpmyadmin shows a white page.
chmod 644