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Thanks, Imre On Mon, Aug 11, 2025 at 04:52:55PM +0200, Laurent Bigonville wrote: > Hello, > > On my Dell Latitude 5530 laptop, with an external screen connected using > USB-C, from time to time, when coming back after both screens have been put > in powersave mode, I've the following warning in dmesg: > > > [12292.586347] ------------[ cut here ]------------ > > [12292.586359] i915 0000:00:02.0: [drm] drm_WARN_ON(ret) > > [12292.586512] WARNING: CPU: 0 PID: 32608 at > > drivers/gpu/drm/i915/display/intel_tc.c:1744 > > intel_tc_port_link_reset_work+0x398/0x3b0 [i915] > > [12292.587044] Modules linked in: tun sd_mod scsi_mod scsi_common > > hid_logitech_hidpp uhid snd_seq_dummy snd_hrtimer snd_seq snd_seq_device > > xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT xt_tcpudp nft_compat > > nf_nat_tftp nf_conntrack_tftp bridge stp llc ccm nf_conntrack_netbios_ns > > nf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib > > nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct > > nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 > > nf_tables overlay rfcomm qrtr cmac algif_hash algif_skcipher af_alg bnep > > sunrpc binfmt_misc snd_sof_pci_intel_tgl snd_sof_pci_intel_cnl > > snd_sof_intel_hda_generic soundwire_intel soundwire_generic_allocation > > snd_sof_intel_hda_sdw_bpt snd_sof_intel_hda_common snd_soc_hdac_hda > > snd_sof_intel_hda_mlink snd_sof_intel_hda soundwire_cadence > > snd_hda_codec_hdmi snd_sof_pci snd_sof_xtensa_dsp snd_sof snd_sof_utils > > snd_soc_acpi_intel_match snd_soc_acpi_intel_sdca_quirks snd_soc_acpi > > crc8 soundwire_bus snd_soc_sdca snd_soc_avs intel_uncore_frequency > > [12292.587154]  snd_soc_hda_codec intel_uncore_frequency_common > > snd_hda_codec_realtek snd_hda_ext_core x86_pkg_temp_thermal > > snd_hda_codec_generic snd_soc_core intel_powerclamp > > snd_hda_scodec_component snd_compress nls_ascii coretemp iwlmvm > > snd_pcm_dmaengine nls_cp437 snd_hda_intel vfat kvm_intel > > snd_intel_dspcfg fat uvcvideo snd_intel_sdw_acpi btusb mac80211 > > processor_thermal_device_pci videobuf2_vmalloc snd_hda_codec dell_pc > > btrtl processor_thermal_device kvm processor_thermal_wt_hint snd_ctl_led > > uvc platform_profile snd_hda_core btintel libarc4 > > platform_temperature_control videobuf2_memops processor_thermal_rfim > > dell_rbtn intel_rapl_msr irqbypass snd_hwdep btbcm mei_pxp mei_hdcp > > videobuf2_v4l2 dell_wmi processor_thermal_rapl dell_laptop iwlwifi > > intel_rapl_common rapl btmtk snd_pcm videodev dell_smbios intel_pmc_core > > processor_thermal_wt_req intel_cstate dell_wmi_sysman > > processor_thermal_power_floor snd_timer dcdbas intel_uncore pcspkr > > cfg80211 videobuf2_common bluetooth mei_me pmt_telemetry dell_wmi_ddv > > dell_smm_hwmon > > [12292.587262]  int3403_thermal processor_thermal_mbox snd > > firmware_attributes_class dell_wmi_descriptor wmi_bmof ee1004 mc mei > > pmt_class cdc_acm rfkill intel_hid igen6_edac int3400_thermal > > int340x_thermal_zone soundcore acpi_pad acpi_tad > > intel_pmc_ssram_telemetry acpi_thermal_rel sparse_keymap joydev ac evdev > > msr i2c_dev parport_pc ppdev lp parport efi_pstore nfnetlink ip_tables > > x_tables autofs4 ext4 crc16 mbcache jbd2 crc32c_cryptoapi dm_crypt > > dm_mod raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor > > async_tx xor raid6_pq raid1 raid0 md_mod typec_displayport > > hid_plantronics usbhid xe intel_vsec drm_gpuvm configfs drm_gpusvm > > gpu_sched drm_ttm_helper drm_exec drm_suballoc_helper hid_sensor_custom > > hid_sensor_hub intel_ishtp_hid i915 drm_buddy ttm ucsi_acpi i2c_algo_bit > > typec_ucsi hid_multitouch iTCO_wdt drm_display_helper typec hid_generic > > intel_pmc_bxt cec roles ghash_clmulni_intel iTCO_vendor_support xhci_pci > > rc_core i2c_hid_acpi nvme sha512_ssse3 rtsx_pci_sdmmc watchdog > > intel_lpss_pci xhci_hcd > > [12292.587396]  drm_client_lib i2c_hid nvme_core sha1_ssse3 psmouse > > mmc_core i2c_i801 intel_lpss intel_ish_ipc drm_kms_helper usbcore hid > > nvme_keyring aesni_intel serio_raw e1000e video rtsx_pci i2c_smbus > > thunderbolt idma64 intel_ishtp nvme_auth drm usb_common button battery > > wmi efivarfs > > [12292.587445] CPU: 0 UID: 0 PID: 32608 Comm: kworker/u48:12 Tainted: G  > >       W           6.16-amd64 #1 PREEMPT(lazy) Debian 6.16-1~exp1 > > [12292.587458] Tainted: [W]=WARN > > [12292.587462] Hardware name: Dell Inc. Latitude 5530/0C6CYC, BIOS > > 1.30.1 05/01/2025 > > [12292.587467] Workqueue: events_unbound intel_tc_port_link_reset_work > > [i915] > > [12292.587823] RIP: 0010:intel_tc_port_link_reset_work+0x398/0x3b0 [i915] > > [12292.588156] Code: 48 8b 5f 50 48 85 db 75 03 48 8b 1f e8 01 2e 70 cf > > 48 c7 c1 10 96 49 c1 48 89 da 48 c7 c7 cc 95 49 c1 48 89 c6 e8 c8 5d de > > ce <0f> 0b e9 32 ff ff ff e8 1c 87 ac cf 66 66 2e 0f 1f 84 00 00 00 00 > > [12292.588160] RSP: 0018:ffffd2e70c2e3db8 EFLAGS: 00010282 > > [12292.588167] RAX: 0000000000000000 RBX: ffff8ab0826f74b0 RCX: > > 0000000000000027 > > [12292.588171] RDX: ffff8ab7ef41ce08 RSI: 0000000000000001 RDI: > > ffff8ab7ef41ce00 > > [12292.588173] RBP: ffff8ab081795c90 R08: 0000000000000000 R09: > > 0000000000000000 > > [12292.588176] R10: 0000000000000000 R11: 0000000000000004 R12: > > ffff8ab1b4e75800 > > [12292.588179] R13: ffffd2e70c2e3de0 R14: ffff8ab08c744628 R15: > > 00000000ffffffea > > [12292.588183] FS:  0000000000000000(0000) GS:ffff8ab85cdc8000(0000) > > knlGS:0000000000000000 > > [12292.588187] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > [12292.588190] CR2: 00007f54af377160 CR3: 000000059042c002 CR4: > > 0000000000f72ef0 > > [12292.588195] PKRU: 55555554 > > [12292.588197] Call Trace: > > [12292.588205]  > > [12292.588216]  process_one_work+0x18a/0x340 > > [12292.588227]  worker_thread+0x256/0x3a0 > > [12292.588233]  ? __pfx_worker_thread+0x10/0x10 > > [12292.588239]  kthread+0xf9/0x240 > > [12292.588247]  ? __pfx_kthread+0x10/0x10 > > [12292.588253]  ? __pfx_kthread+0x10/0x10 > > [12292.588260]  ret_from_fork+0x15c/0x190 > > [12292.588268]  ? __pfx_kthread+0x10/0x10 > > [12292.588275]  ret_from_fork_asm+0x1a/0x30 > > [12292.588285]  > > [12292.588287] ---[ end trace 0000000000000000 ]--- > > The port it's connected to is a Thunderbolt port, but the screen only uses > USB-C > > An idea what's happening? > > libdrm: 2.4.124 > mesa: 25.0.7 > > Kind regards, > > Laurent Bigonville >