| 2024-04-20 06:08:23 |
Eugene San |
bug |
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added bug |
| 2024-04-20 06:08:23 |
Eugene San |
attachment added |
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linux-6.8.0-28-i915_.log https://bugs.launchpad.net/bugs/2062951/+attachment/5768458/+files/linux-6.8.0-28-i915_.log |
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| 2024-04-21 21:56:24 |
Eugene San |
tags |
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kernel-bug regression-release |
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| 2024-04-22 05:08:06 |
Brett Grandbois |
linux (Ubuntu): assignee |
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Anthony Wong (anthonywong) |
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| 2024-04-23 01:03:44 |
Launchpad Janitor |
linux (Ubuntu): status |
New |
Confirmed |
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| 2024-04-23 03:07:51 |
Charles Evans |
bug |
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added subscriber Charles Evans |
| 2024-05-02 20:23:39 |
Leon Williams |
bug |
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added subscriber Leon Williams |
| 2024-05-18 20:46:14 |
Oibaf |
bug |
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added subscriber Oibaf |
| 2024-05-18 21:42:38 |
Eugene San |
summary |
Random flickering with i915 on Linux 6.8 |
Random flickering with Intel i915 on Linux 6.8 (Ubuntu 24.04) |
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| 2024-05-23 02:47:11 |
Kenneth W Green |
attachment added |
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GrubIdlePatch.png https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+attachment/5781539/+files/GrubIdlePatch.png |
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| 2024-05-24 07:48:15 |
Danijel |
bug |
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added subscriber Danijel |
| 2024-05-25 06:52:21 |
jeekajoo |
bug |
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added subscriber jeekajoo |
| 2024-05-27 14:39:37 |
Rapha |
bug |
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added subscriber Rapha |
| 2024-05-31 12:34:55 |
Simon Engelsman |
bug |
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added subscriber Simon Engelsman |
| 2024-06-04 02:01:19 |
Mark Hepburn |
bug |
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added subscriber Mark Hepburn |
| 2024-06-07 20:19:25 |
Anthony Wong |
linux (Ubuntu): assignee |
Anthony Wong (anthonywong) |
AceLan Kao (acelankao) |
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| 2024-06-10 09:17:17 |
Andrew Rump |
bug |
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added subscriber Andrew Rump |
| 2024-06-11 01:54:20 |
Daniel van Vugt |
tags |
kernel-bug regression-release |
flicker i915 kernel-bug mantic noble regression-release |
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| 2024-06-11 01:54:55 |
Daniel van Vugt |
bug |
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added subscriber Daniel van Vugt |
| 2024-06-17 01:30:49 |
Daniel van Vugt |
summary |
Random flickering with Intel i915 on Linux 6.8 (Ubuntu 24.04) |
Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) |
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| 2024-06-19 09:26:59 |
Marlon Anjos |
bug |
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added subscriber Marlon Anjos |
| 2024-06-22 12:27:47 |
Serhii Tsynailo |
bug |
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added subscriber Serhii Tsynailo |
| 2024-06-24 19:27:00 |
ralfi |
bug |
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added subscriber ralfi |
| 2024-06-25 19:51:47 |
Eugene San |
bug watch added |
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https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11504 |
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| 2024-07-02 02:51:11 |
Viral Wang |
bug |
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added subscriber Viral Wang |
| 2024-07-04 23:16:20 |
Ian Truelsen |
bug |
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added subscriber Ian Truelsen |
| 2024-07-25 22:19:48 |
Jeffrey Knockel |
bug |
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added subscriber Jeffrey Knockel |
| 2024-07-28 18:47:55 |
Oibaf |
bug task added |
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linux |
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| 2024-07-29 06:45:48 |
Bug Watch Updater |
linux: status |
Unknown |
New |
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| 2024-08-06 18:49:39 |
Eric Lindgren |
bug |
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added subscriber Eric Lindgren |
| 2024-08-07 14:58:06 |
Ben Bipod |
bug |
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added subscriber Ben Bipod |
| 2024-08-12 03:40:05 |
AceLan Kao |
nominated for series |
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Ubuntu Noble |
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| 2024-08-12 03:40:05 |
AceLan Kao |
bug task added |
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linux (Ubuntu Noble) |
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| 2024-08-12 03:40:05 |
AceLan Kao |
nominated for series |
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Ubuntu Oracular |
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| 2024-08-12 03:40:05 |
AceLan Kao |
bug task added |
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linux (Ubuntu Oracular) |
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| 2024-08-12 03:40:41 |
AceLan Kao |
linux (Ubuntu Noble): status |
New |
In Progress |
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| 2024-08-12 03:40:44 |
AceLan Kao |
linux (Ubuntu Oracular): status |
Confirmed |
In Progress |
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| 2024-08-12 03:40:48 |
AceLan Kao |
linux (Ubuntu Noble): assignee |
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AceLan Kao (acelankao) |
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| 2024-08-12 06:16:05 |
AceLan Kao |
description |
After migrating Mantic 23.10 install to Linux 6.8.0, I am experiencing heavy flickering at random.
It happens after a moderate to heavy on screen activity like window switching, scrolling etc.
It never happens when playing video or when there is no interaction using keyboard/pointer.
It tend to happen when the mouse cursor is in the bottom quarter of the screen and stops immediately when the cursor leaves that screen region.
Around the same time the following appears in kernel log:
kernel: i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun
Happens on both X11 and Wayland on both KDE plasma and Mate (though less).
I first encountered the issue with Linux 6.8.0-11 and it still happens with Ubunutu's 6.8.0-28 and Mainline 6.8.7.
Kernels 6.6, 6.5, 6.1 and older did not have that issue.
Hardware is: Dell XPS 9350, Vendor Intel, Driver i915, Skylake GT2 [HD Graphics 520]
Software: Ubuntu 23.10, KDE Plasma 5.27.10 / Mate 1.26
Attaching kernel log for 6.8.0-28 |
SRU Justification
[Impact]
The flickering predominantly occurs when the mouse cursor is in the bottom quarter of the screen and stops when the cursor leaves this area.
Extensive testing across various kernel versions revealed that the issue became apparent from kernel version 6.8.0 onward, correlating with the mentioned configuration changes, CONFIG_INTEL_IOMMU_DEFAULT_ON and CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON.
The problem persists in the latest drm tip.
[Fix]
As an immediate workaround, adding 'intel_iommu=igfx_off' to the kernel command line has been found to effectively eliminate the flickering issue.
This patch proposes the same behavior as 'intel_iommu=igfx_off' and apply the rule to all Intel SKL GPU IDs.
[Test]
1. Boot up to desktop with 6.8.0-x kernels
2. Moving cursor around the desktop
3. There should be no flicker while cursor is moving
[Where problems could occur]
For virtualized environments using hardware-assisted virtualization for graphics (such as VFIO or mediated pass-through), disabling IOMMU for graphics could either disable these features or reduce their security and efficiency.
Usually, users pass the 'intel_iommu=on' by themselves when they are using related features. So, the impact of this change is minimal.
===========
After migrating Mantic 23.10 install to Linux 6.8.0, I am experiencing heavy flickering at random.
It happens after a moderate to heavy on screen activity like window switching, scrolling etc.
It never happens when playing video or when there is no interaction using keyboard/pointer.
It tend to happen when the mouse cursor is in the bottom quarter of the screen and stops immediately when the cursor leaves that screen region.
Around the same time the following appears in kernel log:
kernel: i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun
Happens on both X11 and Wayland on both KDE plasma and Mate (though less).
I first encountered the issue with Linux 6.8.0-11 and it still happens with Ubunutu's 6.8.0-28 and Mainline 6.8.7.
Kernels 6.6, 6.5, 6.1 and older did not have that issue.
Hardware is: Dell XPS 9350, Vendor Intel, Driver i915, Skylake GT2 [HD Graphics 520]
Software: Ubuntu 23.10, KDE Plasma 5.27.10 / Mate 1.26
Attaching kernel log for 6.8.0-28 |
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| 2024-08-14 01:36:57 |
Summer Abdelghani |
bug |
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added subscriber Summer Abdelghani |
| 2024-08-14 18:42:48 |
Oliver Dalton |
bug |
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added subscriber Oliver Dalton |
| 2024-08-14 19:59:14 |
Ian Truelsen |
removed subscriber Ian Truelsen |
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| 2024-08-14 20:13:38 |
Sean LaPlante |
bug watch added |
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https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11762 |
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| 2024-08-16 13:47:28 |
Stefan Bader |
linux (Ubuntu Noble): importance |
Undecided |
Medium |
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| 2024-08-16 13:49:02 |
Stefan Bader |
linux (Ubuntu Noble): status |
In Progress |
Fix Committed |
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| 2024-08-19 02:34:26 |
thom |
tags |
flicker i915 kernel-bug mantic noble regression-release |
flicker i915 jammy kernel-bug mantic noble regression-release |
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| 2024-08-20 05:50:54 |
Daniel van Vugt |
bug task added |
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linux-hwe-6.8 (Ubuntu) |
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| 2024-08-20 05:51:05 |
Daniel van Vugt |
tags |
flicker i915 jammy kernel-bug mantic noble regression-release |
flicker i915 jammy kernel-bug mantic noble regression-release regression-update |
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| 2024-08-20 05:51:54 |
Launchpad Janitor |
linux-hwe-6.8 (Ubuntu): status |
New |
Confirmed |
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| 2024-08-20 05:51:54 |
Launchpad Janitor |
linux-hwe-6.8 (Ubuntu Noble): status |
New |
Confirmed |
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| 2024-08-20 05:53:05 |
Daniel van Vugt |
linux-hwe-6.8 (Ubuntu Noble): status |
Confirmed |
Invalid |
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| 2024-08-20 05:53:10 |
Daniel van Vugt |
linux-hwe-6.8 (Ubuntu Oracular): status |
Confirmed |
Invalid |
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| 2024-08-20 05:53:22 |
Daniel van Vugt |
nominated for series |
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Ubuntu Jammy |
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| 2024-08-20 05:53:22 |
Daniel van Vugt |
bug task added |
|
linux (Ubuntu Jammy) |
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| 2024-08-20 05:53:22 |
Daniel van Vugt |
bug task added |
|
linux-hwe-6.8 (Ubuntu Jammy) |
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| 2024-08-20 05:53:39 |
Daniel van Vugt |
linux (Ubuntu Jammy): status |
New |
Invalid |
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| 2024-08-20 05:53:45 |
Daniel van Vugt |
linux-hwe-6.8 (Ubuntu Jammy): status |
New |
Confirmed |
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| 2024-08-20 21:28:29 |
Rinad Erezhepov |
bug |
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added subscriber Rinad Erezhepov |
| 2024-08-31 20:25:03 |
damien |
bug |
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added subscriber damien |
| 2024-09-02 04:08:54 |
Terence Tan |
bug |
|
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added subscriber Terence Tan |
| 2024-09-03 03:42:47 |
Daniel van Vugt |
summary |
Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) |
Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 |
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| 2024-09-03 03:43:48 |
Daniel van Vugt |
summary |
Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 |
Random flickering with Intel i915 (Gen9 GPUs in 6th-8th gen CPUs) on Linux 6.8 |
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| 2024-09-04 14:39:35 |
Bozsoki András |
bug |
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added subscriber Bozsoki András |
| 2024-09-06 10:10:05 |
Jesus Capita |
bug |
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added subscriber Jesus Capita |
| 2024-09-09 12:01:08 |
Ubuntu Kernel Bot |
tags |
flicker i915 jammy kernel-bug mantic noble regression-release regression-update |
flicker i915 jammy kernel-bug kernel-spammed-noble-linux-oem-6.11-v2 mantic noble regression-release regression-update verification-needed-noble-linux-oem-6.11 |
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| 2024-09-10 12:43:41 |
Adam Smith |
tags |
flicker i915 jammy kernel-bug kernel-spammed-noble-linux-oem-6.11-v2 mantic noble regression-release regression-update verification-needed-noble-linux-oem-6.11 |
flicker i915 jammy kernel-bug kernel-spammed-noble-linux-oem-6.11-v2 mantic noble regression-release regression-update verification-failed-noble-linux-oem-6.11 |
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| 2024-09-11 11:28:36 |
Adam Smith |
bug |
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added subscriber Adam Smith |
| 2024-09-13 07:20:57 |
Koen Roggemans |
bug |
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added subscriber Koen Roggemans |
| 2024-09-13 19:15:41 |
Tushar |
bug |
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added subscriber Tushar |
| 2024-09-16 10:39:50 |
Launchpad Janitor |
linux (Ubuntu Oracular): status |
In Progress |
Fix Released |
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