Bug 1279797
Summary: | Hard freezes and/or garbled image occur when using high resolution docking station display outputs (Lenovo T440s/i7-4600U, | ||
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Product: | Red Hat Enterprise Linux 7 | Reporter: | David Jaša <djasa> |
Component: | kernel | Assignee: | Lyude <lyude> |
kernel sub component: | Graphics | QA Contact: | Desktop QE <desktop-qa-list> |
Status: | CLOSED CURRENTRELEASE | Docs Contact: | |
Severity: | unspecified | ||
Priority: | unspecified | CC: | cdonnell, djasa, lyude, mkarg, rclark, tpelka |
Version: | 7.2 | ||
Target Milestone: | rc | ||
Target Release: | --- | ||
Hardware: | Unspecified | ||
OS: | Unspecified | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | Bug Fix | |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2016-11-10 07:09:45 UTC | Type: | Bug |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: |
Description
David Jaša
2015-11-10 10:42:07 UTC
This is an issue caused by Haswell's inability to actually drive displays at 4K with a refresh rate of 60Hz even if it thinks it can. While you might be thinking "but Haswell isn't THAT old, surely this must be a mistake" unfortunately I've confirmed this with multiple developers from Intel after running into issues with this myself. This being said, while we can't run 4K at 60Hz we can do it at 30Hz. Luckily there happens to be a few WIP fixes upstream for doing this in i915. |