This seems to depend on kernel version. On one F30 system it works: [root@yoga ryniker]# uname -r 5.0.17-300.fc30.x86_64 [root@yoga ryniker]# ls -l /sys/kernel/debug/usb/devices -r--r--r--. 1 root root 0 May 30 09:59 /sys/kernel/debug/usb/devices [root@yoga ryniker]# cat /sys/kernel/debug/usb/devices T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 2 B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0 D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=1d6b ProdID=0002 Rev= 5.00 S: Manufacturer=Linux 5.0.17-300.fc30.x86_64 ehci_hcd S: Product=EHCI Host Controller S: SerialNumber=0000:00:1d.0 C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=480 MxCh= 8 D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1 P: Vendor=8087 ProdID=8001 Rev= 0.03 C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=256ms ... while on another, with the latest (non-test) kernel, it fails: [root@puget ryniker]# uname -r 5.1.6-300.fc30.x86_64 [root@puget ryniker]# ls -l /sys/kernel/debug/usb/devices -r--r--r--. 1 root root 0 Jun 6 08:11 /sys/kernel/debug/usb/devices [root@puget ryniker]# cat /sys/kernel/debug/usb/devices cat: /sys/kernel/debug/usb/devices: Operation not permitted _______________________________________________ test mailing list -- test@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to test-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/test@xxxxxxxxxxxxxxxxxxxxxxx
