Comment 31 for bug 791833

Hi,

Benjamin and I could try to address this if we had access to the device. If someone feels like sending one to us, we'll be glad to help.

Cheers,

St.

Le 12 janv. 2012 à 14:04, <email address hidden> a écrit :

> Hi everybody,
> Nothing more under 3.2.0-8.
>
> Is there today a way to help ST220T working well under linux ??
> If i compile the kernel with the patch, will i have click functionality ??
>
> Thanks for all,
> iSi.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/791833
>
> Title:
> Dell ST2220T Monitor responds to touch only on warm boot from windows
>
> Status in OEM Priority Project:
> Invalid
> Status in OEM Priority Project oneiric series:
> Invalid
> Status in “linux” package in Ubuntu:
> Confirmed
> Status in “linux” source package in Oneiric:
> Confirmed
> Status in “linux” package in Fedora:
> Unknown
>
> Bug description:
> Dell ST2220T Monitors have been purchased. On first install, the
> touchscreen worked pretty well. But it started to behave weird after
> restarts. The behaviour is as follows:
>
> On cold boot touch never works. But once going to Windows 7 and coming
> back after a warm boot, the touch works perfectly. From now, it works
> until there are no cold boots. Once cold boot happens into Ubuntu,
> touch stops working. This behaviour has been consistent. I tried to
> put usbhid.quirks with <vendorid> : <productid>: 0x40 as mentioned
> here http://ubuntuforums.org/showthread.php?p=10287057#post10287057
> but it did not work.
>
> This is on Ubuntu Natty.
>
> A patch from Red Hat bugzilla:
> https://bugzilla.redhat.com/show_bug.cgi?id=703118 seems to help the
> issue significantly, but, a few touch features (such as "click") seem
> to still need some work. The patch doesn't seem to be upstream yet in
> the mainline kernel.
>
>
>
> SRU Request:
>
> Impact:
>
> Customer currently has 150 of these monitors with plans to expand to 1,500 next year and 10,000 in the year after that. Getting these devices to
> work with ubuntu will help out a lot with cost reduction for the customer.
>
> Patch:
>
> See bugzilla reference above.
>
> Steps to reproduce:
>
> 1) Install 11.04 (In this case the system was dual-booted with Windows 7)
> 2) Without the patch, the touchscreen only seems to work if the machine is warm-rebooted from Windows. The touch features don't work at all if the system is cold-booted into Ubuntu.
> 3) With the patch, the touchscreen appears to work with cold boots and warm reboots, but, 'click' features on the touchscreen still need to be applied.
>
> TEST CASE:
>
> Apply the patch to the kernel, then test the touchscreen after warm
> reboots and cold boots to ensure that the touchscreen is fully
> functional. Customer has agreed to assist with testing, etc.
>
> Regression Potential:
>
> Unknown at this time. Patch appears to be pretty trivial and isolated
> so regression potential seems to be pretty low.
>
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