Access to USB device denied
I have a ColorHug ALS ambient light sensor that I use together with the DDC/CI interface of my display to automatically set the brightness of my displays just like every smartphone does. It is connected via USB:
$ lsusb
Bus 001 Device 028: ID 273f:1007 Hughski Limited
…
This has been working fine until a few weeks ago, some Fedora upgrade likely has changed something. I have a file /lib/udev/rules.d/99-i2c-permissions.rules which contains this:
KERNEL=="i2c-[0-9]*", GROUP="i2c", MODE="0660"
Also my user account is in the i2c group. Also all these devices should be readable for my user:
$ ls /dev/i2c-* -l
crw-rw----. 1 root i2c 89, 0 26. Dez 10:41 /dev/i2c-0
crw-rw----. 1 root i2c 89, 1 26. Dez 10:41 /dev/i2c-1
crw-rw----. 1 root i2c 89, 2 26. Dez 10:41 /dev/i2c-2
crw-rw----. 1 root i2c 89, 3 26. Dez 10:41 /dev/i2c-3
crw-rw----. 1 root i2c 89, 4 26. Dez 10:41 /dev/i2c-4
crw-rw----. 1 root i2c 89, 5 26. Dez 10:41 /dev/i2c-5
crw-rw----. 1 root i2c 89, 6 26. Dez 10:41 /dev/i2c-6
crw-rw----. 1 root i2c 89, 7 26. Dez 10:41 /dev/i2c-7
crw-rw----. 1 root i2c 89, 8 26. Dez 10:41 /dev/i2c-8
crw-rw----. 1 root i2c 89, 9 26. Dez 10:41 /dev/i2c-9
But now I get the following when trying to get a reading from the device:
$ colorhug-cmd take-reading-raw
No connection to device: USB error on device 273f:1007 : Access denied (insufficient permissions) [-3]
Calling this as root still works, so it is just a permission problem.
Why does the permission not get passed to my normal user account and how can I restore that?
permissions usb
asked 19 mins ago
Martin Ueding
1,28811127
add a comment |
I have a ColorHug ALS ambient light sensor that I use together with the DDC/CI interface of my display to automatically set the brightness of my displays just like every smartphone does. It is connected via USB:
$ lsusb
Bus 001 Device 028: ID 273f:1007 Hughski Limited
…
This has been working fine until a few weeks ago, some Fedora upgrade likely has changed something. I have a file /lib/udev/rules.d/99-i2c-permissions.rules which contains this:
KERNEL=="i2c-[0-9]*", GROUP="i2c", MODE="0660"
Also my user account is in the i2c group. Also all these devices should be readable for my user:
$ ls /dev/i2c-* -l
crw-rw----. 1 root i2c 89, 0 26. Dez 10:41 /dev/i2c-0
crw-rw----. 1 root i2c 89, 1 26. Dez 10:41 /dev/i2c-1
crw-rw----. 1 root i2c 89, 2 26. Dez 10:41 /dev/i2c-2
crw-rw----. 1 root i2c 89, 3 26. Dez 10:41 /dev/i2c-3
crw-rw----. 1 root i2c 89, 4 26. Dez 10:41 /dev/i2c-4
crw-rw----. 1 root i2c 89, 5 26. Dez 10:41 /dev/i2c-5
crw-rw----. 1 root i2c 89, 6 26. Dez 10:41 /dev/i2c-6
crw-rw----. 1 root i2c 89, 7 26. Dez 10:41 /dev/i2c-7
crw-rw----. 1 root i2c 89, 8 26. Dez 10:41 /dev/i2c-8
crw-rw----. 1 root i2c 89, 9 26. Dez 10:41 /dev/i2c-9
But now I get the following when trying to get a reading from the device:
$ colorhug-cmd take-reading-raw
No connection to device: USB error on device 273f:1007 : Access denied (insufficient permissions) [-3]
Calling this as root still works, so it is just a permission problem.
Why does the permission not get passed to my normal user account and how can I restore that?
permissions usb
asked 19 mins ago
Martin Ueding
1,28811127
add a comment |
I have a ColorHug ALS ambient light sensor that I use together with the DDC/CI interface of my display to automatically set the brightness of my displays just like every smartphone does. It is connected via USB:
$ lsusb
Bus 001 Device 028: ID 273f:1007 Hughski Limited
…
This has been working fine until a few weeks ago, some Fedora upgrade likely has changed something. I have a file /lib/udev/rules.d/99-i2c-permissions.rules which contains this:
KERNEL=="i2c-[0-9]*", GROUP="i2c", MODE="0660"
Also my user account is in the i2c group. Also all these devices should be readable for my user:
$ ls /dev/i2c-* -l
crw-rw----. 1 root i2c 89, 0 26. Dez 10:41 /dev/i2c-0
crw-rw----. 1 root i2c 89, 1 26. Dez 10:41 /dev/i2c-1
crw-rw----. 1 root i2c 89, 2 26. Dez 10:41 /dev/i2c-2
crw-rw----. 1 root i2c 89, 3 26. Dez 10:41 /dev/i2c-3
crw-rw----. 1 root i2c 89, 4 26. Dez 10:41 /dev/i2c-4
crw-rw----. 1 root i2c 89, 5 26. Dez 10:41 /dev/i2c-5
crw-rw----. 1 root i2c 89, 6 26. Dez 10:41 /dev/i2c-6
crw-rw----. 1 root i2c 89, 7 26. Dez 10:41 /dev/i2c-7
crw-rw----. 1 root i2c 89, 8 26. Dez 10:41 /dev/i2c-8
crw-rw----. 1 root i2c 89, 9 26. Dez 10:41 /dev/i2c-9
But now I get the following when trying to get a reading from the device:
$ colorhug-cmd take-reading-raw
No connection to device: USB error on device 273f:1007 : Access denied (insufficient permissions) [-3]
Calling this as root still works, so it is just a permission problem.
Why does the permission not get passed to my normal user account and how can I restore that?
permissions usb
asked 19 mins ago
Martin Ueding
1,28811127
I have a ColorHug ALS ambient light sensor that I use together with the DDC/CI interface of my display to automatically set the brightness of my displays just like every smartphone does. It is connected via USB:
$ lsusb
Bus 001 Device 028: ID 273f:1007 Hughski Limited
…
This has been working fine until a few weeks ago, some Fedora upgrade likely has changed something. I have a file /lib/udev/rules.d/99-i2c-permissions.rules which contains this:
KERNEL=="i2c-[0-9]*", GROUP="i2c", MODE="0660"
Also my user account is in the i2c group. Also all these devices should be readable for my user:
$ ls /dev/i2c-* -l
crw-rw----. 1 root i2c 89, 0 26. Dez 10:41 /dev/i2c-0
crw-rw----. 1 root i2c 89, 1 26. Dez 10:41 /dev/i2c-1
crw-rw----. 1 root i2c 89, 2 26. Dez 10:41 /dev/i2c-2
crw-rw----. 1 root i2c 89, 3 26. Dez 10:41 /dev/i2c-3
crw-rw----. 1 root i2c 89, 4 26. Dez 10:41 /dev/i2c-4
crw-rw----. 1 root i2c 89, 5 26. Dez 10:41 /dev/i2c-5
crw-rw----. 1 root i2c 89, 6 26. Dez 10:41 /dev/i2c-6
crw-rw----. 1 root i2c 89, 7 26. Dez 10:41 /dev/i2c-7
crw-rw----. 1 root i2c 89, 8 26. Dez 10:41 /dev/i2c-8
crw-rw----. 1 root i2c 89, 9 26. Dez 10:41 /dev/i2c-9
But now I get the following when trying to get a reading from the device:
$ colorhug-cmd take-reading-raw
No connection to device: USB error on device 273f:1007 : Access denied (insufficient permissions) [-3]
Calling this as root still works, so it is just a permission problem.
Why does the permission not get passed to my normal user account and how can I restore that?
permissions usb
permissions usb
asked 19 mins ago
Martin Ueding
1,28811127
asked 19 mins ago
Martin Ueding
1,28811127
asked 19 mins ago
Martin Ueding
1,28811127
asked 19 mins ago
Martin Ueding
1,28811127
asked 19 mins ago
Martin Ueding
1,28811127
1,28811127
add a comment |
add a comment |
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