Mantel announced the move on a Suse Linux mailing list on Tuesday, and Novell confirmed the move on Wednesday.
"I just decided to leave Suse/Novell. This is not (any) longer the company I founded 13 years ago," Mantel said in the e-mail. "I have been the maintainer of the SuSE kernel for more than a decade now. I'm very confident the Novell management will find a competent successor very quickly."
The move won't affect Novell, spokesman Bruce Lowry said. "He was one of a large number of people on the kernel team. It doesn't impact our strategy or our ability to execute on it," he said.
Novell acquired Suse Linux in 2003 for US$210 million and has been under pressure to build its open-source business faster. Novell last week announced a plan to elevate its Linux products, lay off 600 employees and divest its Celerant consulting group.
Despite its troubles, Suse Linux is the top alternative to Red Hat and remains a major factor in the Linux market. It's certified globally to work with major server and software products, something others haven't achieved. But Red Hat Enterprise Linux remains much more popular, and Red Hat is much more profitable.
The cuts at Novell last week were significant, but there was "virtually no impact" to the Linux development team, said Ron Hovsepian, Novell's president and anticipated chief executive officer, in an interview last week.
