Hi Ping,
Ping Cheng wrote:
> Here is an update on my testing (for hardware, I have to test to be
> sure). The result shows driver in upstream and 3.2.20 both work with
> TPC2FG.
Again, thanks much for this.
Nils (cc-ed) tested Linus's "master" branch (3.5-rc2+) this morning.
The outcome:
| I built the kernel from the git repository as you described. The tablet
| does not work.
|
| lsusb -t gives:
| Port 5: Dev 5, If 0, Class=HID, Driver=, 12M
|
| The dmesg output is attached. The two input files mentioned in this
| file, which are related to the wacom tablet, are not there after
| booting.
Logs at [1].
For comparison, v3.4.2 works fine. v3.4.2 plus some unrelated
Intuous5 support patches (9fee619505bd + f860e581fd47 + 9b5b95dd516a +
ae584ca47328) also works fine.
Nils also tested v3.4.2 plus the following patch.
f393ee2b814e Input: wacom - retrieve maximum number of touch points
from the HID usage table when it is supported
The exact patch used is at [2]. That produced:
| Linux video capture interface: v2.00
| ------------[ cut here ]------------
| kernel BUG at mm/slab.c:505!
| invalid opcode: 0000 [#1] SMP
[...]
| Pid: 579, comm: modprobe Not tainted 3.4.2-amd64 #1 LENOVO 42992QG/42992QG
[...]
| Call Trace:
| [<ffffffff810ef84e>] ? kfree+0x50/0x6c
| [<ffffffffa04029cd>] ? wacom_probe+0x52c/0x957 [wacom]
| [<ffffffffa006866b>] ? usb_probe_interface+0xf2/0x15d [usbcore]
which is "BUG_ON(!PageSlab(page))" in page_get_cache() and represents
a free of an invalid pointer.
Full log at [3].
Known problem? Any ideas for tracking it down?
Thanks again and hope that helps,
Jonathan
[1] http://bugs.debian.org/677164#87
[2] http://bugs.debian.org/677164#50
[3] http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=77;filename=dmesg_0001;att=1;bug=677164
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