[Bug 1875649] Re: [Ice Lake] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL
This issue seems to be fixed in a recent update for Kubuntu 20.04, running kernel 5.4.0-37-generic. ** Changed in: linux (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875649 Title: [Ice Lake] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1875649/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1875649] Re: [Ice Lake] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL
Still occurs on 5.4.0-31 update, only less severe. Laptop is useable now as long as no video is being played. By the looks of it, i915.enable_psr=0 as kernel boot parameter doesn't have any notable effect. The logmessage using drm.debug=0x06 is as follows: [ 84.074499] [drm:drm_mode_addfb2 [drm]] [FB:192] [ 84.090664] [drm:drm_mode_addfb2 [drm]] [FB:220] [ 84.107575] [drm:drm_mode_addfb2 [drm]] [FB:192] [ 84.112742] [drm:i915_hotplug_work_func [i915]] running encoder hotplug functions [ 84.112772] [drm:i915_hotplug_work_func [i915]] Connector eDP-1 (pin 4) received hotplug event. [ 84.112802] [drm:intel_dp_detect [i915]] [CONNECTOR:191:eDP-1] [ 84.112831] [drm:intel_dp_print_rates [i915]] source rates: 162000, 216000, 27, 324000, 432000, 54 [ 84.112857] [drm:intel_dp_print_rates [i915]] sink rates: 162000, 216000, 243000, 27, 324000, 378000, 432000, 54 [ 84.112880] [drm:intel_dp_print_rates [i915]] common rates: 162000, 216000, 27, 324000, 432000, 54 [ 84.113411] [drm:intel_dp_get_dsc_sink_cap [i915]] DSC DPCD: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 84.113424] [drm:intel_dp_get_dsc_sink_cap [i915]] FEC CAPABILITY: 0 [ 84.113829] [drm:intel_dp_detect [i915]] MST support? port A: no, sink: no, modparam: yes [ 84.114226] [drm:drm_dp_get_edid_quirks [drm_kms_helper]] DP sink: EDID mfg 30-e4 prod-ID 1f-06 quirks: 0x [ 84.125822] [drm:drm_mode_addfb2 [drm]] [FB:220] [ 84.142046] [drm:drm_mode_addfb2 [drm]] [FB:192] [ 84.160425] [drm:drm_mode_addfb2 [drm]] [FB:220] Instead of storms of hotplug events on 5.4.0-29, 5.4.0-31 has single hotplug events that cause a single flicker, instead of a storm of hotplug events. This makes the system almost useable. In 5.4.0-31 I noticed something else. Result of dmesg -w | grep vdd_edp dmesg -w | grep vdd [ 560.948837] [drm:edp_panel_vdd_on [i915]] Turning eDP port A VDD on [ 560.949091] [drm:edp_panel_vdd_on [i915]] PP_STATUS: 0x8008 PP_CONTROL: 0x006f [ 567.912874] [drm:edp_panel_vdd_off_sync [i915]] Turning eDP port A VDD off [ 567.913095] [drm:edp_panel_vdd_off_sync [i915]] PP_STATUS: 0x8008 PP_CONTROL: 0x0067 [ 573.884411] [drm:edp_panel_vdd_on [i915]] Turning eDP port A VDD on [ 573.884594] [drm:edp_panel_vdd_on [i915]] PP_STATUS: 0x8008 PP_CONTROL: 0x006f [ 580.969230] [drm:edp_panel_vdd_off_sync [i915]] Turning eDP port A VDD off [ 580.969377] [drm:edp_panel_vdd_off_sync [i915]] PP_STATUS: 0x8008 PP_CONTROL: 0x0067 [ 590.500251] [drm:edp_panel_vdd_on [i915]] Turning eDP port A VDD on [ 590.500480] [drm:edp_panel_vdd_on [i915]] PP_STATUS: 0x8008 PP_CONTROL: 0x006f [ 594.537592] [drm:edp_panel_vdd_off_sync [i915]] Turning eDP port A VDD off It seems that the first that happens when watching a video or doing some more heavy graphics related stuff for some reason causes the edp panel to turn on, while it is already on and displaying video for some amounth of time. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875649 Title: [Ice Lake] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1875649/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1875649] Re: [Ice Lake] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL
I tried the ubuntu 20.04 live cd today and the screen flicker re- appeard. So: Ubuntu 18.04: no screen flicker Kubuntuu 18.04: screen flicker Ubuntu 20.04: screen flicker Kubuntu 20.04: screen flicker -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875649 Title: [Ice Lake] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1875649/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1875649] Re: [Ice Lake] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL
I noticed something I can't explain. I tried Ubuntu 18.04 and that worked flawlessly. Then I tried Kubuntu 18.04 and the flicker returns. I don't know the important differences between these two distros in the graphics stack to nail down the but. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875649 Title: [Ice Lake] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1875649/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1875649] Re: [Ice Lake] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL
While https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/1873587 also happens, I'm not that interested in it. I get screen flicker during normal operation like watching video or opening a program. That is more important than some flickers during startup for me since screen flickers during startup while annoying, don't stop me from using my laptop. The cause might be thesame, but the symptoms aren't. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875649 Title: [Ice Lake] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1875649/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1875649] Re: [Ice Lake] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL
*** This bug is a duplicate of bug 1873587 *** https://bugs.launchpad.net/bugs/1873587 https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1874010 mentions that kernel 5.5.19 fixes the bug occuring in that pc. For me it does not, it improves the complete flicker into horizontal lines of a few pixels wide that are corrupted into random snow when watching video, and occasionally the lines take up 1/3 of the screen and the screen goes black for a second or two. relevant dmegs -w output [ 26.555038] sof-audio-pci :00:1f.3: error: no reply expected, received 0x0 [ 26.648780] sof-audio-pci :00:1f.3: firmware boot complete [ 44.154221] sof-audio-pci :00:1f.3: error: no reply expected, received 0x0 [ 44.245269] sof-audio-pci :00:1f.3: firmware boot complete [ 286.125367] ideapad_laptop: Unknown event: 10 [ 340.736173] sof-audio-pci :00:1f.3: error: no reply expected, received 0x0 [ 340.829032] sof-audio-pci :00:1f.3: firmware boot complete Nothing changed in the non-debug log on first glance. So to me it looks like there's another uncovered bug happening. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875649 Title: [Ice Lake] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1875649/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1875649] Re: [Ice Lake] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL
*** This bug is a duplicate of bug 1873587 *** https://bugs.launchpad.net/bugs/1873587 bug https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1875254 mentions that kernel 5.4.0-28 should've fixed the issue reported in that bug. kernel 5.4.0-28 and the testkernel mentioned in that issue did not result in different behaviour on my machine, the bug is still present. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875649 Title: [Ice Lake] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1875649/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1875649] Re: Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL
** Description changed: - Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL + Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL I am filing this bug again in accordance with: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1875073/comments/3 I've deleted the repository and checked again, and the bug still persists. Old bug report: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1875073 My screen flickers on Kubuntu 20.04LTS. See: https://imgur.com/a/FoWI1sp Also affected: - Kubuntu 19.10 - Fedora 31 + Kubuntu 19.10 + Fedora 31 System: inxi -Gxxx - Graphics: Device-1: Intel Iris Plus Graphics G7 vendor: Lenovo driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:8a52 -Display: x11 server: X.Org 1.20.8 driver: modesetting compositor: kwin_x11 resolution: 1920x1080~60Hz -OpenGL: renderer: Mesa Intel Iris Plus Graphics (ICL GT2) v: 4.6 Mesa 20.0.4 direct render: Yes + Graphics: Device-1: Intel Iris Plus Graphics G7 vendor: Lenovo driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:8a52 + Display: x11 server: X.Org 1.20.8 driver: modesetting compositor: kwin_x11 resolution: 1920x1080~60Hz + OpenGL: renderer: Mesa Intel Iris Plus Graphics (ICL GT2) v: 4.6 Mesa 20.0.4 direct render: Yes Reproduction scenario's: 1) Starting Kubuntu, screen flickers a couple of times during startup and turns black for multiple seconds. 2) Start a youtube video, near-constant flickering. Audio works fine. 3) Open up various applications. Screen starts flickering every now and then. 4) Leave pc unattended for a long time, screen starts flickering sporadically. Things I tried: - * Use various kernels - * linux kernel 3.4, 3.5, 3.6, 3.7rc2 - * Ubuntu port of linux kernel 3.4.0-26-generic + patch https://gitlab.freedesktop.org/jkrzyszt/i915/-/commit/1ee48a61aa57dbdbc3cd2808d8b28df40d938e44 - * intel-drm-next (kernel panic) - * Oibaf PPA + * Use various kernels + * linux kernel 3.4, 3.5, 3.6, 3.7rc2 + * Ubuntu port of linux kernel 3.4.0-26-generic + patch https://gitlab.freedesktop.org/jkrzyszt/i915/-/commit/1ee48a61aa57dbdbc3cd2808d8b28df40d938e44 + * intel-drm-next (kernel panic) + * Oibaf PPA + * various kernel parameters + + What does work: + * When using windows, the screen works. So no hardware error. + * When using "nomodeset" kernel parameter Kubuntu 20.04 works, but then there's no sound or hardware acceleration. What I think is happening: - i915 is apperantly an unstable driver for eDP 1.4 screens. - That, in combination with a 10'th gen intel cpu is not a good combination. - According to dmesg the firmware of sof-audio-pci is restarting. - - [ 324.775087] sof-audio-pci :00:1f.3: error: no reply expected, received 0x0 - [ 324.866267] sof-audio-pci :00:1f.3: firmware boot complete - - Could the audio part of the eDP connection be breaking because of an issue similar to the patch that is mentioned earlyer? + i915 is apperantly an unstable driver for eDP 1.4 screens. + That, in combination with a 10'th gen intel cpu is not a good combination. + According to dmesg the firmware of sof-audio-pci is restarting. + + [ 324.775087] sof-audio-pci :00:1f.3: error: no reply expected, received 0x0 + [ 324.866267] sof-audio-pci :00:1f.3: firmware boot complete + + Could the audio part of the eDP connection be breaking because of an + issue similar to the patch that is mentioned earlyer? ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xorg 1:7.7+19ubuntu14 ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30 Uname: Linux 5.4.0-26-generic x86_64 ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 CasperMD5CheckResult: skip CompositorRunning: None Date: Tue Apr 28 15:31:27 2020 DistUpgraded: Fresh install DistroCodename: focal DistroVariant: ubuntu GraphicsCard: - Intel Corporation Iris Plus Graphics G7 [8086:8a52] (rev 07) (prog-if 00 [VGA controller]) -Subsystem: Lenovo Iris Plus Graphics G7 [17aa:3801] + Intel Corporation Iris Plus Graphics G7 [8086:8a52] (rev 07) (prog-if 00 [VGA controller]) + Subsystem: Lenovo Iris Plus Graphics G7 [17aa:3801] InstallationDate: Installed on 2020-04-25 (3 days ago) InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) MachineType: LENOVO 81Q9 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-26-generic root=UUID=5d977dfa-1fa5-412b-9d83-644cef18af6e ro rootflags=subvol=@ quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/09/2020 dmi.bios.vendor: LENOVO dmi.bios.version: AUCN54WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: LNVNB161216 dmi.board.vendor: LENOVO dmi.boa
[Bug 1875649] Re: Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL
This is a small piece of the log when watching a log. the i915 eDP driver receives a "hotplug event received", which corresponds with a slingle flickering of the screen. So I assume something goes wrong with retraining the link, or for some reason the screen thinks that the pc is disconnected and triggers an interrupt, which then for some other reason flickers the screen. I'm not well-versed with eDP 1.4, so I assume to be totally wrong. ** Attachment added: "relevant portion of dmesg with "drm.debug=14" kernel parameter" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1875649/+attachment/5362494/+files/dmesg.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875649 Title: Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1875649/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1875649] [NEW] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL
Public bug reported: Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL I am filing this bug again in accordance with: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1875073/comments/3 I've deleted the repository and checked again, and the bug still persists. Old bug report: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1875073 My screen flickers on Kubuntu 20.04LTS. See: https://imgur.com/a/FoWI1sp Also affected: Kubuntu 19.10 Fedora 31 System: inxi -Gxxx Graphics: Device-1: Intel Iris Plus Graphics G7 vendor: Lenovo driver: i915 v: kernel bus ID: 00:02.0 chip ID: 8086:8a52 Display: x11 server: X.Org 1.20.8 driver: modesetting compositor: kwin_x11 resolution: 1920x1080~60Hz OpenGL: renderer: Mesa Intel Iris Plus Graphics (ICL GT2) v: 4.6 Mesa 20.0.4 direct render: Yes Reproduction scenario's: 1) Starting Kubuntu, screen flickers a couple of times during startup and turns black for multiple seconds. 2) Start a youtube video, near-constant flickering. Audio works fine. 3) Open up various applications. Screen starts flickering every now and then. 4) Leave pc unattended for a long time, screen starts flickering sporadically. Things I tried: * Use various kernels * linux kernel 3.4, 3.5, 3.6, 3.7rc2 * Ubuntu port of linux kernel 3.4.0-26-generic + patch https://gitlab.freedesktop.org/jkrzyszt/i915/-/commit/1ee48a61aa57dbdbc3cd2808d8b28df40d938e44 * intel-drm-next (kernel panic) * Oibaf PPA What I think is happening: i915 is apperantly an unstable driver for eDP 1.4 screens. That, in combination with a 10'th gen intel cpu is not a good combination. According to dmesg the firmware of sof-audio-pci is restarting. [ 324.775087] sof-audio-pci :00:1f.3: error: no reply expected, received 0x0 [ 324.866267] sof-audio-pci :00:1f.3: firmware boot complete Could the audio part of the eDP connection be breaking because of an issue similar to the patch that is mentioned earlyer? ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xorg 1:7.7+19ubuntu14 ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30 Uname: Linux 5.4.0-26-generic x86_64 ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 CasperMD5CheckResult: skip CompositorRunning: None Date: Tue Apr 28 15:31:27 2020 DistUpgraded: Fresh install DistroCodename: focal DistroVariant: ubuntu GraphicsCard: Intel Corporation Iris Plus Graphics G7 [8086:8a52] (rev 07) (prog-if 00 [VGA controller]) Subsystem: Lenovo Iris Plus Graphics G7 [17aa:3801] InstallationDate: Installed on 2020-04-25 (3 days ago) InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) MachineType: LENOVO 81Q9 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-26-generic root=UUID=5d977dfa-1fa5-412b-9d83-644cef18af6e ro rootflags=subvol=@ quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/09/2020 dmi.bios.vendor: LENOVO dmi.bios.version: AUCN54WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: LNVNB161216 dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 31 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo Yoga C940-14IIL dmi.modalias: dmi:bvnLENOVO:bvrAUCN54WW:bd01/09/2020:svnLENOVO:pn81Q9:pvrLenovoYogaC940-14IIL:rvnLENOVO:rnLNVNB161216:rvrSDK0J40709WIN:cvnLENOVO:ct31:cvrLenovoYogaC940-14IIL: dmi.product.family: Yoga C940-14IIL dmi.product.name: 81Q9 dmi.product.sku: LENOVO_MT_81Q9_BU_idea_FM_Yoga C940-14IIL dmi.product.version: Lenovo Yoga C940-14IIL dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.101-2 version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1 ** Affects: xorg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug edp eoan flicker focal i915 icelake screenflicker ubuntu -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875649 Title: Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1875649/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1875073] Re: Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL
I tried getting a debug log of drm.i915 using "drm.debug=0x06" as a kernel parameter. In the log dmesg.txt there's a "hotplug event received" in batches, everytime one of those appears, my screen flickers. Which is weird to me since I don't unplug my fixed laptop screen. It's likely that this is not a hardware faillure since this problem is not reproducible on Windows. ** Attachment added: "dmesg log with kernel parameter "drm.debug=0x06"" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1875073/+attachment/5361005/+files/dmesg.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875073 Title: Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1875073/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1875073] [NEW] Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL
Public bug reported: I'm experiencing a problem extremely similar to https://gitlab.freedesktop.org/drm/intel/-/issues/272 My screen flickers too on a fresh install of Kubuntu 20.04LTS https://imgur.com/a/FoWI1sp Results of `inxi -Gx` ` Graphics: Device-1: Intel Iris Plus Graphics G7 vendor: Lenovo driver: i915 v: kernel bus ID: 00:02.0 Display: x11 server: X.Org 1.20.8 driver: modesetting resolution: 1920x1080~60Hz OpenGL: renderer: Mesa Intel Iris Plus Graphics (ICL GT2) v: 4.6 Mesa 20.1.0-devel (git-a64d266 2020-04-25 focal-oibaf-ppa) direct render: Yes ` I've tried 915.enable_psr=0 as a boot parameter, didn't work. nomodeset does get me into a bootable image, but I'm looking into getting a working driver. Fedora 31 was having a similar issue, there was barely any flickering up untill some recent kernel updates. (about a couple small ones every 10 minutes or so) Kubuntu 19.10 was quite stable too, untill I installed a lenovo provided firmware update (from AUCN45WW to AUCN54WW), which made it slightly worse. I also tried a couple of other kernel parameters that haven't had any effect. Running kernel 5.6 on Kubuntu did have thesame issue as regular kubuntu 20.04. Running kernel 5.7-rc2 did fix the problem, but networking and sound was dead, so it's only half a solution. I highly suspect it's an issue with i915, but I don't know how I would trace it down. I don't know why and I don't know how. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: xorg 1:7.7+19ubuntu14 ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30 Uname: Linux 5.4.0-26-generic x86_64 ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: skip CompositorRunning: None CurrentDesktop: KDE Date: Sat Apr 25 20:49:36 2020 DistUpgraded: Fresh install DistroCodename: focal DistroVariant: ubuntu GraphicsCard: Intel Corporation Iris Plus Graphics G7 [8086:8a52] (rev 07) (prog-if 00 [VGA controller]) Subsystem: Lenovo Iris Plus Graphics G7 [17aa:3801] InstallationDate: Installed on 2020-04-25 (0 days ago) InstallationMedia: Kubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) MachineType: LENOVO 81Q9 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-26-generic root=UUID=5d977dfa-1fa5-412b-9d83-644cef18af6e ro rootflags=subvol=@ quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/09/2020 dmi.bios.vendor: LENOVO dmi.bios.version: AUCN54WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: LNVNB161216 dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 31 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo Yoga C940-14IIL dmi.modalias: dmi:bvnLENOVO:bvrAUCN54WW:bd01/09/2020:svnLENOVO:pn81Q9:pvrLenovoYogaC940-14IIL:rvnLENOVO:rnLNVNB161216:rvrSDK0J40709WIN:cvnLENOVO:ct31:cvrLenovoYogaC940-14IIL: dmi.product.family: Yoga C940-14IIL dmi.product.name: 81Q9 dmi.product.sku: LENOVO_MT_81Q9_BU_idea_FM_Yoga C940-14IIL dmi.product.version: Lenovo Yoga C940-14IIL dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.101+git2004241830.bf63f8~oibaf~f version.libgl1-mesa-dri: libgl1-mesa-dri 20.1~git2004250730.a64d26~oibaf~f version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1 ** Affects: ubuntu Importance: Undecided Status: New ** Tags: 5.7-rc2 amd64 apport-bug ermine fedora31 focal i915 kubuntu resolution third-party-packages ubuntu -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875073 Title: Screen flickering in Kubuntu 20.04 on Lenovo Yoga C940 14-IIL To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1875073/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1872760] Re: i915 - after return from suspend display is flickering
So it looks thesame (maybe a little less) but happens under different circumstances? I'm experiencing a similar issue and maybe got a temporary fix. All I know is that with my laptop (Lenovo Yoga C940 14IL) i've got thesame flickering as in that issue on Kubuntu 19.10, Kubuntu 20.04 and Fedora KDE 31. Those are all 5.3.x and 5.4.x kernels if I got my kernel numbers right. I've tried upgrading Kubuntu 20.04 to mainline kernel 5.6.0-050600 and that didn't work. Upgrading to 5.7-rc2 seems to work, but network card doesn't work out of the box. I've tried this issue with OpenGL 2.0, 3.1 and XRender with various settings for vsync, that does have major effect to occurrence, and that's why I think that how often it occurs isn't that important. Could you try to install 5.6.0-050600 and 5.7-rc2 to confirm that the underlying issue is thesame and fixed in 5.7? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1872760 Title: i915 - after return from suspend display is flickering To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1872760/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1872760] Re: i915 - after return from suspend display is flickering
There seems to be a known issue of i915 related screen flickering with relation to power states, refresh rates and eDP for intel i915 in recent kernels. (If i understand the issue correctly) Can you confirm that the flickering is thesame as the videos in the description of: https://gitlab.freedesktop.org/drm/intel/-/issues/272 ? ** Bug watch added: gitlab.freedesktop.org/drm/intel/-/issues #272 https://gitlab.freedesktop.org/drm/intel/-/issues/272 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1872760 Title: i915 - after return from suspend display is flickering To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1872760/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
