Public bug reported:
Logs are filled with this error, and the computer sometimes hang
completely requiring a physical reboot (unsure if it relates to this
particular issue, but nothing else seems odd...)
[25229.317065] ------------[ cut here ]------------
[25229.317076] i915 0000:00:02.0: [drm] drm_WARN_ON(tc->mode == TC_PORT_LEGACY)
[25229.317082] WARNING: drivers/gpu/drm/i915/display/intel_tc.c:934 at
adlp_tc_phy_connect+0x111/0x200 [i915], CPU#1: kworker/1:3/204
[25229.317585] Modules linked in: ccm nf_conntrack_netlink xt_nat xt_tcpudp
veth snd_hda_codec_intelhdmi snd_hda_codec_hdmi snd_hda_codec_conexant
snd_hda_codec_generic xt_conntrack xt_MASQUERADE bridge stp llc xfrm_user
xfrm_algo xe xt_set ip_set drm_gpusvm_helper gpu_sched nft_chain_nat drm_gpuvm
nf_nat drm_ttm_helper drm_exec nf_conntrack drm_suballoc_helper nf_defrag_ipv6
nf_defrag_ipv4 xt_addrtype nft_compat x_tables nf_tables qrtr overlay
snd_hda_intel snd_sof_pci_intel_tgl snd_sof_pci_intel_cnl
snd_sof_intel_hda_generic soundwire_intel snd_sof_intel_hda_sdw_bpt
snd_sof_intel_hda_common binfmt_misc snd_soc_hdac_hda snd_sof_intel_hda_mlink
snd_sof_intel_hda soundwire_cadence snd_sof_pci snd_sof_xtensa_dsp snd_sof
snd_sof_utils snd_soc_acpi_intel_match snd_soc_acpi_intel_sdca_quirks
soundwire_generic_allocation snd_soc_sdw_utils snd_soc_acpi soundwire_bus
x86_pkg_temp_thermal snd_soc_sdca intel_powerclamp coretemp hid crc8
snd_soc_avs kvm_intel snd_soc_hda_codec snd_hda_ext_core snd_hda_codec kvm
snd_hda_core
[25229.317709] rtw88_8821ce snd_intel_dspcfg snd_intel_sdw_acpi cmdlinepart
rtw88_8821c irqbypass spi_nor rtw88_pci rapl rtw88_core snd_hwdep mtd ee1004
intel_rapl_msr intel_cstate wmi_bmof i915 processor_thermal_device_pci
snd_soc_core nls_iso8859_1 mac80211 btusb processor_thermal_device btmtk
processor_thermal_wt_hint snd_compress platform_temperature_control btrtl
processor_thermal_soc_slider ac97_bus btbcm btintel snd_pcm_dmaengine
spi_intel_pci processor_thermal_rfim processor_thermal_rapl snd_pcm spi_intel
bluetooth intel_rapl_common drm_buddy snd_timer i2c_i801 cfg80211 snd cp210x
soundcore i2c_smbus ttm usbserial processor_thermal_wt_req i2c_mux libarc4
processor_thermal_power_floor processor_thermal_mbox mei_me
int340x_thermal_zone drm_display_helper cec rc_core mei igen6_edac i2c_algo_bit
platform_profile ov13858 v4l2_fwnode v4l2_async videodev intel_pmc_core mc
pmt_telemetry pmt_discovery pmt_class int3400_thermal intel_pmc_ssram_telemetry
intel_vsec acpi_thermal_rel acpi_tad acpi_pad mac_hid sch_fq_codel
[25229.317843] efi_pstore dm_multipath nfnetlink spi_pxa2xx_platform dw_dmac
8250_dw dw_dmac_core spi_pxa2xx_core ghash_clmulni_intel r8169 video sdhci_pci
realtek sdhci_uhs2 intel_lpss_pci sdhci cqhci ahci intel_lpss libahci idma64
wmi pinctrl_alderlake dm_mirror dm_region_hash dm_log msr dmi_sysfs autofs4
aesni_intel
[25229.317898] CPU: 1 UID: 0 PID: 204 Comm: kworker/1:3 Kdump: loaded Tainted:
G W 7.0.0-28-generic #28-Ubuntu PREEMPT(lazy)
[25229.317907] Tainted: [W]=WARN
[25229.317910] Hardware name: AMI Intel/Intel, BIOS V2.1_238 06/13/2025
[25229.317914] Workqueue: events output_poll_execute
[25229.317926] RIP: 0010:adlp_tc_phy_connect+0x11f/0x200 [i915]
[25229.318385] Code: 48 85 d2 0f 84 f3 00 00 00 48 89 f7 48 89 55 d8 e8 36 08
cc d5 48 8d 3d ff b2 91 ff 48 8b 55 d8 48 c7 c1 48 d4 46 c1 48 89 c6 <67> 48 0f
b9 3a 48 8b 03 48 8b 10 48 85 d2 74 0b 48 89 d7 e8 09 07
[25229.318393] RSP: 0018:ffffcce5404d7c28 EFLAGS: 00010246
[25229.318400] RAX: ffffffffc148ddfd RBX: ffff8926c3942c00 RCX: ffffffffc146d448
[25229.318405] RDX: ffff8926c1a2d780 RSI: ffffffffc148ddfd RDI: ffffffffc10bb690
[25229.318409] RBP: ffffcce5404d7c50 R08: 0000000000000000 R09: 0000000000000000
[25229.318413] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8926cd606000
[25229.318417] R13: 0000000000000017 R14: 0000000000000001 R15: ffff8926c3942c00
[25229.318421] FS: 0000000000000000(0000) GS:ffff892a95e7f000(0000)
knlGS:0000000000000000
[25229.318426] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[25229.318430] CR2: 00007cd3530f5dc0 CR3: 00000001f3244006 CR4: 0000000000f72ef0
[25229.318435] PKRU: 55555554
[25229.318439] Call Trace:
[25229.318444] <TASK>
[25229.318455] intel_tc_port_reset_mode+0x1e5/0x2d0 [i915]
[25229.318869] __intel_tc_port_lock+0xe3/0x140 [i915]
[25229.319223] intel_tc_port_lock+0x1a/0x30 [i915]
[25229.319575] intel_digital_port_connected+0x33/0xa0 [i915]
[25229.319929] intel_dp_detect+0xed/0x550 [i915]
[25229.320236] detect_connector_status+0x21/0x60
[25229.320245] drm_helper_probe_detect_ctx+0x75/0xe0
[25229.320254] output_poll_execute+0x17c/0x2e0
[25229.320260] process_one_work+0x1ac/0x3d0
[25229.320268] worker_thread+0x1b8/0x360
[25229.320274] ? __pfx_worker_thread+0x10/0x10
[25229.320303] kthread+0xf7/0x130
[25229.320312] ? __pfx_kthread+0x10/0x10
[25229.320319] ret_from_fork+0x195/0x2a0
[25229.320327] ? __pfx_kthread+0x10/0x10
[25229.320334] ? __pfx_kthread+0x10/0x10
[25229.320340] ret_from_fork_asm+0x1a/0x30
[25229.320350] </TASK>
[25229.320353] ---[ end trace 0000000000000000 ]---
Rythm seems stable at 1 log every 25 seconds approx.
Linux Release:
Description: Ubuntu 26.04 LTS
Release: 26.04
cat /proc/version_signature
Ubuntu 7.0.0-28.28-generic 7.0.12
Result of command sudo lspci -vnvn > lspci-vnvn.log is attached to the
bug report
Machine is a mini PC with Intel N97 CPU and Intel UHD Graphics @ 1.20
GHz [Integrated] GPU
** Affects: ubuntu
Importance: Undecided
Status: New
** Attachment added: "lspci_vnvn.log"
https://bugs.launchpad.net/bugs/2161528/+attachment/5985374/+files/lspci_vnvn.log
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https://bugs.launchpad.net/bugs/2161528
Title:
Logs flooded with Warnings from kernel module
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