On 11-11-29 07:17 PM, Dmitry Torokhov wrote: > On Tue, Nov 29, 2011 at 02:43:35PM -0500, Daniel Manrique wrote: >> On 11-11-29 12:53 PM, Dmitry Torokhov wrote: >>> Hi Daniel, >>> >>> On Tue, Nov 29, 2011 at 11:26:19AM -0500, Daniel Manrique wrote: >>>> Hello, >>>> >>>> I apologize for sending this bug report directly; with the kernel.org bugtracker >>>> down I was told this was the best option for the time being. If this is not >>>> correct, could you please let me know of a good place to submit this bug report? >>>> >>>> I have several Dell laptops with Synaptics touchpads, particularly a group of >>>> Vostro V13 systems. On these, after a suspend/resume cycle, the touchpad >>>> (Synaptics) is unresponsive; a workaround is to rmmod psmouse; modprobe psmouse. >>>> >>>> This was first reported on kernel 2.6.38, although I think the issue has been >>>> present from as early as 2.6.32. I verified it for sure with Ubuntu 2.6.38 >>>> kernels, 3.0.0 kernels, and a 3.2.0 kernel from the development release, as well >>>> as a "mainline" 3.1.0-rc10 kernel. >>>> >>>> Since this problem was seen on Ubuntu, it's filed on the Launchpad bug tracker. >>>> The first report I can find is this one: >>>> >>>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/715267 >>>> >>>> This includes a series of log messages I don't see on my systems. I then filed >>>> this other bug: >>>> >>>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/879650 >>>> >>>> The last one contains specific information from one of my systems (a Vostro V13). >>>> >>>> I'd really appreciate any help or guidance on how to solve this problem. If you >>>> need me to collect any information or run any tests on these machines, please >>>> don't hesitate to ask, these systems are primarily used for testing. >>>> >>> >>> Please do: >>> >>> - enable i8042 debug (echo 1 > /sys/module/i8042/parameters/debug) >>> - rmmod psmouse; >>> - suspend/resume; >>> - collect dmesg; >>> - suspend/resume; >>> - collect dmesg again >>> >>> and we'll have to try and find what we do differently. >>> >>> Thanks. >>> >> >> Hi Dmitry, >> >> Thanks so much for the quick reply! >> >> I just ran the tests you requested with some extra steps which I hope won't >> confuse things. Here's the sequence I followed: >> >> - Enabled i8042 debug >> - sudo rmmod psmouse. Touchpad of course becomes unresponsive. >> - sudo pm-suspend >> - Wake the machine by pressing power >> - At this point touchpad is unresponsive. >> - Collected dmesg-1.txt >> - sudo pm-suspend >> - wake the machine by pressing power >> - At this point touchpad is still unresponsive. >> - Collected dmesg-2.txt >> - sudo modprobe psmouse. Touchpad begins responding. >> - Collected dmesg-3.txt >> - sudo pm-suspend >> - wake the machine by pressing power >> - At this point touchpad is again unresponsive. >> - Collected dmesg-4.txt >> >> To avoid attaching largish files to this email, I put the logs on a >> publically-accessible http server at: >> http://people.canonical.com/~roadmr/lp715267/. Please let me know if you prefer >> something else. >> > > Hmm, it just does not want to admit that it is synaptics after reset. > Does the patch below help any? Hi Dmitry, I applied the patch to a 3.2-series kernel (based off 3.2-rc3 I think). It applied cleanly to psmouse.c, and after compiling the driver and putting it in place of the old psmouse.ko, the touchpad works after resuming from suspend! I did a comparison test by swapping drivers (old vs. new) without rebooting, by rmmodding the existing psmouse driver, putting the old/new file in place, reloading the driver and doing a suspend/resume cycle. Consistently, with the old/original driver I still see the problem, but with the new/patched driver the touchpad is always enabled after resume. i only tested this on one of the failing Vostro V13, please let me know if I should test for anything like possible misbehaviors on other previously-working systems or some other kind of regression. But still, this patch seems to work fine, thanks for this! What's the next step for getting this fix into the official kernel? Anything I can do to help? Thanks again, - Daniel -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
