Bug 1811850
Summary: | Request to backport patches for fixing backlight support on the ThinkPad P1 2nd Gen, ThinkPad X1 Extreme 2nd Gen | ||
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Product: | [Fedora] Fedora | Reporter: | Lyude <lyude> |
Component: | kernel | Assignee: | Lyude <lyude> |
Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
Severity: | unspecified | Docs Contact: | |
Priority: | unspecified | ||
Version: | 32 | CC: | airlied, awilliam, bskeggs, hdegoede, ichavero, itamar, jarodwilson, jcline, jeremy, jglisse, john.j5live, jonathan, josef, kernel-maint, linville, lyude, masami256, mchehab, mjg59, pbrobinson, steved |
Target Milestone: | --- | ||
Target Release: | --- | ||
Hardware: | Unspecified | ||
OS: | Unspecified | ||
Whiteboard: | |||
Fixed In Version: | kernel-5.6.0-0.rc5.git0.2.fc32 | Doc Type: | If docs needed, set a value |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2020-03-12 18:57:11 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: | |||
Bug Depends On: | |||
Bug Blocks: | 1705304 |
Description
Lyude
2020-03-09 22:57:42 UTC
Proposed as a Freeze Exception for 32-beta by Fedora user lyude using the blocker tracking app because: A few variants of ThinkPads use AMOLED displays which make use of a new backlight interface over DP AUX. While this backlight interface is supported in i915, there were a number of issues found on laptops that would prevent i915 from correctly detecting DP AUX backlight support and as a result, backlight controls on these laptops don't work properly without passing i915.enable_dpcd_backlight=1 to the kernel boot parameters. Lenovo would like to see a couple of their systems work out of the box with Fedora 32, backlight control included, and actually asked me to request this for them. Note that the patches in question can be found here and here: https://patchwork.freedesktop.org/series/69914/ https://patchwork.freedesktop.org/series/72991/ They don't apply cleanly, so I'll be sending out some fixed up versions of the patches to the fedora-kernel list after filing this Patches are in kernel-5.6.0-0.rc5.git0.2.fc32: https://bodhi.fedoraproject.org/updates/FEDORA-2020-55b2b79091 I'm +1 FE for this, for the record; it's not that critical, but it *is* annoying if you have affected hardware, and we can't fix it for the live desktop environments with an update. We're probably going to get the fix anyway as it's bundled with an accepted FE and an accepted blocker. FEDORA-2020-55b2b79091 has been submitted as an update to Fedora 32. https://bodhi.fedoraproject.org/updates/FEDORA-2020-55b2b79091 kernel-5.6.0-0.rc5.git0.2.fc32, kernel-headers-5.6.0-0.rc5.git0.1.fc32 has been pushed to the Fedora 32 stable repository. If problems still persist, please make note of it in this bug report. |