After upgrade the BIOS to v1.0.13, the issue is gone. Thanks. Yehezkel Bernat <yehezkelshb@xxxxxxxxx> 於 2019年10月10日 週四 下午4:09寫道: > > On Wed, Oct 9, 2019 at 10:56 AM Mika Westerberg > <mika.westerberg@xxxxxxxxxxxxxxx> wrote: > > > > On Wed, Oct 09, 2019 at 03:50:25PM +0800, AceLan Kao wrote: > > > > > There is a new BIOS v1.0.13 on dell website, but it requires windows > > > to upgrade it, I'll try it later. > > > > OK, thanks. > > I'd try to check fwupd if you haven't tried it yet. > Dell FW is usually available there. -- Chia-Lin Kao(AceLan) http://blog.acelan.idv.tw/ E-Mail: acelan.kaoATcanonical.com (s/AT/@/)