linux-kernel - [Regression] Panel flickering on Dell XPS 13 9360 with drm-fixes-2025-06-28 merged (Linux 6.16-rc4)

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Message-ID: <e8c595d4-716f-474c-99ae-c95a56e65d3d@molgen.mpg.de>
Date: Sun, 29 Jun 2025 23:04:31 +0200
From: Paul Menzel <pmenzel@...gen.mpg.de>
To: Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
 Rodrigo Vivi <rodrigo.vivi@...el.com>
Cc: intel-gfx@...ts.freedesktop.org, intel-xe@...ts.freedesktop.org,
 LKML <linux-kernel@...r.kernel.org>, regressions@...ts.linux.dev
Subject: [Regression] Panel flickering on Dell XPS 13 9360 with
 drm-fixes-2025-06-28 merged (Linux 6.16-rc4)

Dear Linux folks,


Just a heads-up, that very likely, merging of branch 
*drm-fixes-2025-06-28* causes flickering of the panel of the Intel Kaby 
Lake laptop Dell XPS 13 9360. 6.16.0-rc3 works fine, and with 
6.16-rc3-00329-gdfba48a70cb6 the panel flickers. I try to bisect, but 
maybe you already have an idea.


Kind regards,

Paul


$ lspci -nn
00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v6/7th Gen 
Core Processor Host Bridge/DRAM Registers [8086:5904] (rev 02)
00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 
620 [8086:5916] (rev 02)
00:04.0 Signal processing controller [1180]: Intel Corporation Xeon 
E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem 
[8086:1903] (rev 02)
00:14.0 USB controller [0c03]: Intel Corporation Sunrise Point-LP USB 
3.0 xHCI Controller [8086:9d2f] (rev 21)
00:14.2 Signal processing controller [1180]: Intel Corporation Sunrise 
Point-LP Thermal subsystem [8086:9d31] (rev 21)
00:15.0 Signal processing controller [1180]: Intel Corporation Sunrise 
Point-LP Serial IO I2C Controller #0 [8086:9d60] (rev 21)
00:15.1 Signal processing controller [1180]: Intel Corporation Sunrise 
Point-LP Serial IO I2C Controller #1 [8086:9d61] (rev 21)
00:16.0 Communication controller [0780]: Intel Corporation Sunrise 
Point-LP CSME HECI #1 [8086:9d3a] (rev 21)
00:1c.0 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI 
Express Root Port #1 [8086:9d10] (rev f1)
00:1c.4 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI 
Express Root Port #5 [8086:9d14] (rev f1)
00:1c.5 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI 
Express Root Port #6 [8086:9d15] (rev f1)
00:1d.0 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI 
Express Root Port #9 [8086:9d18] (rev f1)
00:1f.0 ISA bridge [0601]: Intel Corporation Sunrise Point-LP LPC 
Controller [8086:9d58] (rev 21)
00:1f.2 Memory controller [0580]: Intel Corporation Sunrise Point-LP PMC 
[8086:9d21] (rev 21)
00:1f.3 Audio device [0403]: Intel Corporation Sunrise Point-LP HD Audio 
[8086:9d71] (rev 21)
00:1f.4 SMBus [0c05]: Intel Corporation Sunrise Point-LP SMBus 
[8086:9d23] (rev 21)
3a:00.0 Network controller [0280]: Qualcomm Atheros QCA6174 802.11ac 
Wireless Network Adapter [168c:003e] (rev 32)
3b:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A 
PCI Express Card Reader [10ec:525a] (rev 01)
3c:00.0 Non-Volatile memory controller [0108]: SK hynix PC300 NVMe Solid 
State Drive 512GB [1c5c:1284]