| Summary: | touchpad min/max ranges are off | ||||||
|---|---|---|---|---|---|---|---|
| Product: | xorg | Reporter: | Peter Hutterer <peter.hutterer> | ||||
| Component: | Input/synaptics | Assignee: | Benjamin Tissoires <benjamin.tissoires> | ||||
| Status: | RESOLVED NOTOURBUG | QA Contact: | |||||
| Severity: | normal | ||||||
| Priority: | medium | CC: | consume.noise, peter.hutterer, questaemia | ||||
| Version: | git | ||||||
| Hardware: | Other | ||||||
| OS: | All | ||||||
| Whiteboard: | |||||||
| i915 platform: | i915 features: | ||||||
| Bug Depends on: | |||||||
| Bug Blocks: | 74544 | ||||||
| Attachments: |
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Proposed fix on the kernel list: https://lkml.org/lkml/2014/3/7/722 It seems that also the touchpad of the XPS13 9333 is affected. Is there a simple way to get the exact range? I could only notice the discrepancy using evtest. The XPS 13 9333 uses a different touchpad which can be switched to its correct mode. The patch is proposed for kernel v3.16, and Fedora ships a backport of it in its current kernel (F20). So yes, for the XPS13 Haswell, we can have a better way of retrieving the information. closing this bug now, we've fixed the various min/max ranges in the kernels, and most have made their way into stable releases by now as well. |
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Created attachment 94467 [details] illustration of announced ranges vs actual ranges This is a kernel bug but in case we can't fix it there we'll need to add a hack to the driver. The coordinate ranges announced for the touchpad on the T440, T540, x240 is off (PNPID LEN0034). Attached picture shows the discrepancy. Red: range as announced by the kernel Yellow: range inside self-configured edges Blue: actual range reported by the device