Hi Ljubomir, Thanks for your suggestions, I tried kernel-ml & kernel-lt. Seems lots of error for kernel when I was starting the OS. kernel-lt is more stable. Both works fine for my bluetooth dongle. I will use the kernel-lt before CentOS release new kernel version. As my CentOS is for desktop use purpose, not so concern about the stability. Thank you so much! Best Regards, Su Heng On 23 June 2013 20:24, Ljubomir Ljubojevic <centos at plnet.rs> wrote: > On 06/23/2013 08:18 AM, Heng Su wrote: > > Hi All, > > > > I bought a USB Bluetooth dongle. > > > > However, it's not working for me. Please help, how to debug and get more > > information as I can not see any error or warning message from system log > > message. > > > > I checked > http://thread.gmane.org/gmane.linux.bluez.kernel/22183/focus=22211, > > however, also find another page > > > https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html-single/6.3_Release_Notes/index.html > > said > > already support BCM20702A0. > > > > Please help, thank you. > > > > # uname -a > > Linux Host-004 2.6.32-358.11.1.el6.x86_64 #1 SMP Wed Jun 12 03:34:52 UTC > > 2013 x86_64 x86_64 x86_64 GNU/Linux > > > > > > After plugin USB dongle system print out below messages: > > > > Jun 23 13:46:33 Host-004 kernel: usb 1-1.3.4: new full speed USB device > > number 7 using ehci_hcd > > Jun 23 13:46:33 Host-004 kernel: usb 1-1.3.4: New USB device found, > > idVendor=0a5c, idProduct=21e8 > > Jun 23 13:46:33 Host-004 kernel: usb 1-1.3.4: New USB device strings: > > Mfr=1, Product=2, SerialNumber=3 > > Jun 23 13:46:33 Host-004 kernel: usb 1-1.3.4: Product: *BCM20702A0* > > Jun 23 13:46:33 Host-004 kernel: usb 1-1.3.4: Manufacturer: Broadcom Corp > > Jun 23 13:46:33 Host-004 kernel: usb 1-1.3.4: SerialNumber: 0002723348A8 > > Jun 23 13:46:33 Host-004 kernel: usb 1-1.3.4: configuration #1 chosen > from > > 1 choice > > > > > > Below is the verbose information via lsusb: > > > > Bus 001 Device 007: ID 0a5c:21e8 Broadcom Corp. > > You can try with newer kernels from ElRepo > (http://elrepo.org/tiki/tiki-index.php) that have compatible API's with > EL6. look for elrepo-kernel section on main page. Currently there are > kernels 3.0.83-1 and 3.9.7-1. But do note that those are third party > kernels, even though ElRepo is safe third party repository. > > > -- > Ljubomir Ljubojevic > (Love is in the Air) > PL Computers > Serbia, Europe > > StarOS, Mikrotik and CentOS/RHEL/Linux consultant > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > -- Thanks & Best Regards, Su Heng