&#13 Adhering to is a summary of present entertainment news briefs. &#13 U.S. Senate panel to maintain Jan. 24 hearing on ticket market issues &#13 A U.S. Senate committee will hold a hearing on Jan. 24 on the deficiency of levels of competition in the ticketing field following Ticketmaster’s challenges managing the sale of Taylor Swift live performance tickets. The Senate Judiciary Committee hearing is titled “Which is The Ticket: Advertising Competitiveness and Protecting Customers in Stay Leisure.” The committee did not disclose the witnesses. &#13 Porn actor Ron Jeremy found mentally incompetent to stand trial for rape &#13 Porn star Ron Jeremy was declared mentally incompetent to stand trial…