Greg, The lspci output is: ceibal@ceibal:~$ lspci -k 00:00.0 Host bridge: Intel Corporation ValleyView SSA-CUnit (rev 0e) Subsystem: CLEVO/KAPOK Computer Device 5471 00:02.0 VGA compatible controller: Intel Corporation ValleyView Gen7 (rev 0e) Subsystem: CLEVO/KAPOK Computer Device 5471 Kernel driver in use: i915 Kernel modules: i915 00:13.0 SATA controller: Intel Corporation ValleyView 6-Port SATA AHCI Controller (rev 0e) Subsystem: CLEVO/KAPOK Computer Device 5471 Kernel driver in use: ahci Kernel modules: ahci 00:14.0 USB controller: Intel Corporation ValleyView USB xHCI Host Controller (rev 0e) Subsystem: CLEVO/KAPOK Computer Device 5471 Kernel driver in use: xhci_hcd 00:1a.0 Encryption controller: Intel Corporation ValleyView SEC (rev 0e) Subsystem: CLEVO/KAPOK Computer Device 5471 00:1b.0 Audio device: Intel Corporation ValleyView High Definition Audio Controller (rev 0e) Subsystem: CLEVO/KAPOK Computer Device 5471 Kernel driver in use: snd_hda_intel Kernel modules: snd-hda-intel 00:1c.0 PCI bridge: Intel Corporation ValleyView PCI Express Root Port (rev 0e) Kernel driver in use: pcieport Kernel modules: shpchp 00:1c.1 PCI bridge: Intel Corporation ValleyView PCI Express Root Port (rev 0e) Kernel driver in use: pcieport Kernel modules: shpchp 00:1c.2 PCI bridge: Intel Corporation ValleyView PCI Express Root Port (rev 0e) Kernel driver in use: pcieport Kernel modules: shpchp 00:1c.3 PCI bridge: Intel Corporation ValleyView PCI Express Root Port (rev 0e) Kernel driver in use: pcieport Kernel modules: shpchp 00:1f.0 ISA bridge: Intel Corporation ValleyView Power Control Unit (rev 0e) Subsystem: CLEVO/KAPOK Computer Device 5471 00:1f.3 SMBus: Intel Corporation ValleyView SMBus Controller (rev 0e) Subsystem: CLEVO/KAPOK Computer Device 5471 01:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Device 5286 (rev 01) Subsystem: CLEVO/KAPOK Computer Device 5471 Kernel driver in use: rtsx_pci Kernel modules: rtsx_pci 01:00.2 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 06) Subsystem: CLEVO/KAPOK Computer Device 5471 Kernel driver in use: r8169 Kernel modules: r8169 02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188EE Wireless Network Adapter (rev 01) Subsystem: Realtek Semiconductor Co., Ltd. Device 0188 Kernel driver in use: rtl8188ee Kernel modules: rtl8188ee =================================================== Seems like here is happening you are saying, one host-controller (xHCI) manage the three USB port, right ? May be i have a confusion, and i sorry for that, may be what i am asking it is impossible or may be is a blunder, any way following is my thought: " I know that there are several PC, Notebooks with BIOS with the capability to enable/disable xHCI USB mode, where you can choice, xHCI or EHCI. For this reason i thought that could be possible, instead by BIOS, through some kernel configuration or passing a switch parameter at boot time achieve the same behaviour. " Do you are saying that, as this notebook has only one usb host-controller, these option isn't possible ? So the only remainder way to resolve this, is trying with a new one kernel ? Thanks in advance. Gustavo. On Mon, Dec 15, 2014 at 3:08 PM, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > On Mon, Dec 15, 2014 at 02:50:32PM -0200, Gustavo Duarte wrote: >> Hi Greg, >> >> The Notebook has physically 2 port USB 2.0 and one port USB 3.0. The >> manufacturer specs says that and the output of the command lsusb says >> the same: >> >> $ lsusb >> >> Bus 001 Device 002: ID 058f:6254 Alcor Micro Corp. USB Hub >> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub >> Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub >> Bus 001 Device 003: ID 5986:024b Acer, Inc > > Note that USB 3 controllers control USB 2 hubs, odds are there is just > one controller chip in your laptop. > > What does 'lspci' show? > >> >What type of application isn't compatible with xhci-hcd? Shouldn't we >> >fix something like this in the kernel as this isn't a good thing to >> >have. >> >> The app, is a SDK of Robootic kits programming for kids. >> http://www.lejos.org/nxt/nxj/tutorial/Preliminaries/GettingStartedLinux.htm >> The bug is on the firmware-library of the SDK, so there isn't to fix >> on kernel/driver side. > > I don't understand, what exact bug is there? > >> I'm using the kernel compilde by ubuntu 12.04, >> >> $ uname -r >> 3.8.0-33-generic > > Wow that's old and obsolete, sorry, no one can help you with something > like that here :( > > Also, _lots_ of USB 3 bugs have been fixed in the 2 years since that > kernel was released, please try updating and your issues should be > resolve. > >> And i would like still using that, without recompile it, for this >> reason is my question, how can i disable xhci_hcd driver without >> recompile it. ? > > You can unbind the driver from the device, but as I say above, I really > think this driver also controls the USB 2 hubs as well. The output of > 'lspci -k' will show this, can you provide the output of that? > > thanks, > > greg k-h _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
