Le 21/07/2016 à 21:00, L. Han a écrit :
After update to 2.2.0, \Omega is not displayed correctly in Lyx. It looks like a bold \neg now. Hope it will be fixed soon. Thanks!
It could be that the latest version of the fonts supplied with lyx are not properly installed. See http://www.lyx.org/trac/ticket/10161 esp. comment:7.