I also have a recent Wacom tablet (CTH-480S, USB 056a:0302) and can reproduce a kernel panic with a freshly downloaded Xubuntu 14.04 i386 installation image running off a USB stick on my 32-bit netbook -- boot Xubuntu, plug the tablet in, and boom. So this is a real problem with the Trusty kernel on the installation media, regardless of whether it exists in newer upstream kernels (for which the situation seems confused).
The Ubuntu kernel team backported support for this range of tablets to the Trusty kernel by cherry-picks at (I believe) my instigation -- support for them only appeared upstream from 3.14, but a conversation on IRC resulted in the backported support (so I feel slightly responsible). So, it's possible that this is an Ubuntu-specific problem related to the backport -- maybe not enough changes were backported? I did test some daily pre-release images (on amd64) and they worked for me fine then; this is the first time I've tried the final release. (I haven't upgraded my amd64 machine to 14.04 yet; I'm still on 12.04, and with that I'm happily using the tablet with my own hand-rolled input-wacom 0.20.0 DKMS package. I haven't yet tried the amd64 installation image to see if I can get a panic out of it.) I'm happy to gather further diagnostic information as necessary to resolve this issue in Trusty. ** Summary changed: - 056a:0302 Trusty Thar, kernel 3.13: automatic load of wacom.ko driver cause a "hard" kernel panic + 056a:0302 Trusty Tahr, kernel 3.13: automatic load of wacom.ko driver cause a "hard" kernel panic -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1310800 Title: 056a:0302 Trusty Tahr, kernel 3.13: automatic load of wacom.ko driver cause a "hard" kernel panic Status in “linux” package in Ubuntu: Incomplete Bug description: I have just upgraded to 14.04 from 13.10. I have a wacom cth-480 touch+pen tablet, which was not recognized on 13.10 (kernel 3.11). With the stock kernel from 14.04, I have an immediate kernel panic as soon as I plug in the tablet to the laptop. The system is a asus 1005PE (32 bit install), Xubuntu, up-to date: Linux asus-romano 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:08:14 UTC 2014 i686 i686 i686 GNU/Linux The really strange thing is that if I manually load the driver with `sudo modprobe wacom` *before* pluggin the tablet in, then the tablet is recognized and works ok: SYS: Apr 21 15:15:47 asus-romano kernel: [ 265.664161] usbcore: registered new interface driver wacom SYS: Apr 21 15:15:52 asus-romano kernel: [ 270.088161] usb 2-1: new full-speed USB device number 2 using uhci_hcd SYS: Apr 21 15:15:52 asus-romano kernel: [ 270.253626] usb 2-1: New USB device found, idVendor=056a, idProduct=0302 SYS: Apr 21 15:15:52 asus-romano kernel: [ 270.253641] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 SYS: Apr 21 15:15:52 asus-romano kernel: [ 270.253651] usb 2-1: Product: Intuos PTS SYS: Apr 21 15:15:52 asus-romano kernel: [ 270.253659] usb 2-1: Manufacturer: Wacom Co.,Ltd. SYS: Apr 21 15:15:52 asus-romano kernel: [ 270.257027] input: Wacom Intuos PT S Pen as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.0/input/input14 SYS: Apr 21 15:15:52 asus-romano kernel: [ 270.260630] input: Wacom Intuos PT S Finger as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1:1.1/input/input15 SYS: Apr 21 15:15:52 asus-romano mtp-probe: checking bus 2, device 2: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1" SYS: Apr 21 15:15:52 asus-romano mtp-probe: bus: 2, device: 2 was not an MTP device A screenshot of the kernel panic is added. I can reproduce it at will. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1310800/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
