Bug 1571036
Summary: | Kernel updates breaks screen brightness keys | ||
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Product: | [Fedora] Fedora | Reporter: | laolux |
Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> |
Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
Severity: | medium | Docs Contact: | |
Priority: | unspecified | ||
Version: | 27 | CC: | ag, airlied, bskeggs, ewk, hdegoede, ichavero, itamar, jarodwilson, jcline, jglisse, john.j5live, jonathan, josef, kernel-maint, linville, mchehab, mjg59, oswaldo.morizaki.h, steved |
Target Milestone: | --- | ||
Target Release: | --- | ||
Hardware: | x86_64 | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | kernel-4.16.4-300.fc28 kernel-4.16.4-200.fc27 kernel-4.16.7-100.fc26 | Doc Type: | If docs needed, set a value |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2018-04-27 23:07:17 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
laolux
2018-04-24 01:55:40 UTC
Hi, Thanks for the bug report. One commit that jumped out at me between 4.15.16 and 4.15.17 is 965736ee654db8bb009a9736e52cac0278a24a8b. If you boot 4.15.17 with "video.only_lcd=0" added to the kernel command line, does that make any difference? What's the output of "ls /sys/class/backlight"? Hi, (In reply to Jeremy Cline from comment #1) > Hi, > > Thanks for the bug report. One commit that jumped out at me between 4.15.16 > and 4.15.17 is 965736ee654db8bb009a9736e52cac0278a24a8b. If you boot 4.15.17 > with "video.only_lcd=0" added to the kernel command line, does that make any > difference? Oh, good call Jeremy in case you've not seen it yet, here is a commit which should fix the regressions caused by that commit: https://patchwork.kernel.org/patch/10345845/ Perhaps we should add this to the Fedora kernel while it finds it way upstream? > What's the output of "ls /sys/class/backlight"? If "video.only_lcd=0" helps then it likely is empty without that kernel argument. Laolux can you confirm this? Regards, Hans (In reply to Hans de Goede from comment #2) > Hi, > > (In reply to Jeremy Cline from comment #1) > > Hi, > > > > Thanks for the bug report. One commit that jumped out at me between 4.15.16 > > and 4.15.17 is 965736ee654db8bb009a9736e52cac0278a24a8b. If you boot 4.15.17 > > with "video.only_lcd=0" added to the kernel command line, does that make any > > difference? > > Oh, good call Jeremy in case you've not seen it yet, here is a commit which > should fix the regressions caused by that commit: > > https://patchwork.kernel.org/patch/10345845/ > > Perhaps we should add this to the Fedora kernel while it finds it way > upstream? Ah, I hadn't seen that, thanks! I'll see about including it with the v4.16.4 update once I sort out the build failures. *** Bug 1570414 has been marked as a duplicate of this bug. *** kernel-4.16.4-300.fc28 has been submitted as an update to Fedora 28. https://bodhi.fedoraproject.org/updates/FEDORA-2018-5926c0ffc8 kernel-4.16.4-200.fc27 has been submitted as an update to Fedora 27. https://bodhi.fedoraproject.org/updates/FEDORA-2018-e71875c4aa Laolux, Oswaldo, In addition to seeing if "video.only_lcd=0" helps, can you both also test the 4.16.4 update and let us know if that works? Assuming 965736ee654db is the root cause, it should fix things for you, but there's a non-zero chance additional tweaking will be required depending on your hardware. Thanks! Problem solved. Using 4.15.17, "ls /sys/class/backlight" outputs nothing. Adding "video.only_lcd=0" repairs the brightness adjustment with the keyboard keys for both, 4.15.17 and 4.16.3. It also changes the output of "ls /sys/class/backlight" to acpi_video0 -> ../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/backlight/acpi_video0 acpi_video0 -> ../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/backlight/acpi_video0 Kernel 4.16.4 completely fixes the problem, as "video.only_lcd=0" is no longer needed. Thanks a lot! *** Bug 1571876 has been marked as a duplicate of this bug. *** kernel-4.16.4-300.fc28 has been pushed to the Fedora 28 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-5926c0ffc8 kernel-4.16.4-100.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2018-884a105c04 kernel-4.16.4-100.fc26 has been pushed to the Fedora 26 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-884a105c04 kernel-4.16.4-200.fc27 has been pushed to the Fedora 27 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-e71875c4aa kernel-4.16.4-300.fc28 has been pushed to the Fedora 28 stable repository. If problems still persist, please make note of it in this bug report. kernel-4.16.5-100.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2018-884a105c04 kernel-4.16.4-200.fc27 has been pushed to the Fedora 27 stable repository. If problems still persist, please make note of it in this bug report. kernel-4.16.6-100.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2018-884a105c04 kernel-4.16.6-100.fc26 has been pushed to the Fedora 26 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-884a105c04 kernel-4.16.7-100.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2018-884a105c04 kernel-4.16.7-100.fc26 has been pushed to the Fedora 26 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-884a105c04 kernel-4.16.7-100.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report. |