Bug 163603
| Summary: | 10-wacom.rules does not generate the expected /dev/input/wacom simlink | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Edward Grace <ej.grace> |
| Component: | linuxwacom | Assignee: | Aristeu Rozanski <arozansk> |
| Status: | CLOSED DUPLICATE | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 4 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2007-07-05 23:00:22 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
This report targets the FC3 or FC4 products, which have now been EOL'd. Could you please check that it still applies to a current Fedora release, and either update the target product or close it ? Thanks. This bug is a duplicate of bug 196923. I don't know how to mark a bug as a duplicate though. |
Description of problem: 10-wacom.rules does not generate the expected /dev/input/wacom simlink when the USB tablet is inserted. Coupled with the /dev/input/event* device not being predictable this can cause difficulties in /etc/X11/xorg.conf since the expected X input device cannot be guarenteed to match the device that the USB tablet actually appears as. Version-Release number of selected component (if applicable): kernel-2.6.12-1.1398_FC4 linuxwacom-0.6.6-5 How reproducible: Always Steps to Reproduce: 1. Use kernel kernel-2.6.12-1.1398_FC4 2. ls -la /dev/input, will get something like event0 event1 mice mouse0 3. Plug in Wacom Intuos 3 USB tablet 4. ls -la /dev/input, will now see something like event0 event1 event2 mice mouse0 mouse1 Expected results: 4. ls -la /dev/input should yield a symlink such as wacom1->event2 Additional info: Repeated plugging and unplugging of the device can cause the event device that the wacom tablet is attached to to be event2 or event3. This means that if the input device is hard coded in xorg.conf it will go wrong. The symlink should be set up by the 10-wacom.rules to ensure that /dev/input/wacom? is always pointing at the right place. Looking at cat /proc/bus/usb/devices the Wacom tablet appears as the following T: Bus=02 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#= 6 Spd=12 MxCh= 0 D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1 P: Vendor=056a ProdID=00b2 Rev= 1.02 S: Manufacturer=Tablet S: Product=PTZ-930 C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=300mA I: If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=02 Driver=wacom E: Ad=81(I) Atr=03(Int.) MxPS= 10 Ivl=4ms Clearly the correct driver is being used (wacom) however the Manufacturer and Product fields are incorrect. It is probably this that is preventing the 10-wacom.rules from recognising it and generating the correct symlink. Solution: As a hack the following rule works. # udev rule to create /dev/input/wacomN for wacom tablets KERNEL="event*", SYSFS{manufacturer}="Tablet", NAME="input/%k", SYMLINK="input/wacom%e" Where the manufacturer field now matches the (incorrect) manufacturer field reported by /proc/bus/usb/devices