Re: About the reboot hang issue with EHCI driver on the Baytrail platform

2014-08-27 Thread Gavin Guo
Hi Alan, On Wed, Aug 27, 2014 at 10:38 PM, Alan Stern wrote: > On Wed, 27 Aug 2014, Gavin Guo wrote: > >> > Still, why not use the BIOS setting to disable EHCI? >> >> It's hardware enablement policy. By default, we can't change the BIOS >> setting to make the bug disappear until we find out the b

Re: About the reboot hang issue with EHCI driver on the Baytrail platform

2014-08-27 Thread Alan Stern
On Wed, 27 Aug 2014, Gavin Guo wrote: > > Still, why not use the BIOS setting to disable EHCI? > > It's hardware enablement policy. By default, we can't change the BIOS > setting to make the bug disappear until we find out the bug is due to > BIOS's bug. Add kernel parameters is the temporary sol

Re: About the reboot hang issue with EHCI driver on the Baytrail platform

2014-08-26 Thread Gavin Guo
Hi Alan, On Wed, Aug 27, 2014 at 1:26 AM, Alan Stern wrote: > On Wed, 27 Aug 2014, Gavin Guo wrote: > >> >> And IIRC, there is only one host controller within >> >> EHCI and XHCI can be enabled in the Baytrail platform. I'm also trying >> >> to find out the kernel parameters to disable the EHCI

Re: About the reboot hang issue with EHCI driver on the Baytrail platform

2014-08-26 Thread Alan Stern
On Wed, 27 Aug 2014, Gavin Guo wrote: > >> And IIRC, there is only one host controller within > >> EHCI and XHCI can be enabled in the Baytrail platform. I'm also trying > >> to find out the kernel parameters to disable the EHCI driver, but > >> currently there is no available one. > > > > It's n

Re: About the reboot hang issue with EHCI driver on the Baytrail platform

2014-08-26 Thread Gavin Guo
Hi Alan, On Tue, Aug 26, 2014 at 11:38 PM, Alan Stern wrote: > On Tue, 26 Aug 2014, Gavin Guo wrote: > >> Hi, >> >> I found that in the Baytrail-m platform if the "USB3.0 Configuration >> in Pre-OS" is set to Auto in the BIOS, the system will boot with >> EHCI-enabled. And test reboot 200 times.

Re: About the reboot hang issue with EHCI driver on the Baytrail platform

2014-08-26 Thread Alan Stern
On Tue, 26 Aug 2014, Gavin Guo wrote: > Hi, > > I found that in the Baytrail-m platform if the "USB3.0 Configuration > in Pre-OS" is set to Auto in the BIOS, the system will boot with > EHCI-enabled. And test reboot 200 times. It sometimes hang in the > shutdown process "ehci-pci :00:1d.0: sh

About the reboot hang issue with EHCI driver on the Baytrail platform

2014-08-26 Thread Gavin Guo
Hi, I found that in the Baytrail-m platform if the "USB3.0 Configuration in Pre-OS" is set to Auto in the BIOS, the system will boot with EHCI-enabled. And test reboot 200 times. It sometimes hang in the shutdown process "ehci-pci :00:1d.0: shutdown." I also found that sometimes hang in the bo