Bug 1889474
Summary: | External display laggy when using xorg, nouveau, hybrid mode with lid closed | ||
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Product: | [Fedora] Fedora | Reporter: | Mark Pearson <mpearson> |
Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> |
Status: | CLOSED WONTFIX | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
Severity: | high | Docs Contact: | |
Priority: | unspecified | ||
Version: | 33 | CC: | acaringi, airlied, bskeggs, csoriano, ghalat, hdegoede, ichavero, itamar, jarodwilson, jeremy, jglisse, john.j5live, jonathan, josef, kernel-maint, lgoncalv, linville, masami256, mchehab, mjg59, steved |
Target Milestone: | --- | ||
Target Release: | --- | ||
Hardware: | x86_64 | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | If docs needed, set a value | |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2021-05-03 13:44:51 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: | 1816645, 1816768 |
Description
Mark Pearson
2020-10-19 18:09:11 UTC
As a note I reproduced this on the P15 with Fedora 33 latest in wayland, with hybrid mode. I have there only seen it with the nvidia driver, but the nouveau driver keeps crashing and doesn't work with an external monitor on my unit so I'm not sure how important that is. - No obvious messages in the kernel log when switching between output only display and internal or shared. - When external display is enabled (either external only or shared) the CPU utilisation for xorg goes up to ~40%. But the lagginess is seen only when in external only mode - nothing controversial or useful in xrandr between modes - I haven't confirmed with rawhide as the nvidia driver is a pain to install from there. But it is in 5.9.8 and importantly now in wayland which I hadn't seen previously. It means it's much more likely to be encountered by customers and is a bit less of a weird combo. Let me know if there is anything useful I can collect as data Mark I reinstalled F33 and confirmed I don't see the issue with Nouveau with the caveat that I can only enable external only with HDMI attached - it crashes with USB-c into a Thunderbolt port. This seems to be Nvidia driver related at this point. I should really go and retest with my P1G2 but it's my daily machine so messing around with it is a bit of a pain :) Mark As we mentioned on the mail thread, we think it's due to https://gitlab.freedesktop.org/xorg/xserver/-/issues/948, which is a limitation of the present extension in xorg-server for direct rendering apps when using PRIME. There is a WIP MR to try to address this at https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/460, which isn't really ready. However, I would suggest to be cautious: With XOrg being a frozen project upstream, I generally don't expect new features such as this one to be fully implemented, merged and a new xorg-server release to be made for making it available. *** Bug 1936009 has been marked as a duplicate of this bug. *** I think I'm good to close this one - the world is moving on.... |