TGL: `WARNING: CPU: 2 PID: 974 at drivers/gpu/drm/i915/display/intel_tc.c:37 intel_tc_port_init+0x10c/0x170 [i915]`
On a Dell XPS 13 9310 2-in-1
0000:00:02.0 VGA compatible controller [0300]: Intel Corporation TigerLake GT2 [Iris Xe Graphics] [8086:9a49] (rev 01)running Debian sid/unstable, Linux 5.10.9 logs the warning below and lists systemd-udevd as the command triggering it.
[ 0.000000] Linux version 5.10.0-2-amd64 (debian-kernel@lists.debian.org) (gcc-10 (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1) #1 SMP Debian 5.10.9-1 (2021-01-20)
[…]
[ 59.316699] i915 0000:00:02.0: drm_WARN_ON(modular_fia == 0xffffffff)
[ 59.316796] WARNING: CPU: 2 PID: 974 at drivers/gpu/drm/i915/display/intel_tc.c:37 intel_tc_port_init+0x10c/0x170 [i915]
[ 59.316797] Modules linked in: acpi_cpufreq(-) hid_multitouch(+) videodev ansi_cprng mei_me evdev ecdh_generic(+) i915(+) mc cfg80211 joydev ecc mei rfkill nls_ascii nls_cp437 hid_sensor_accel_3d hid_sensor_magn_3d hid_sensor_incl_3d hid_sensor_als hid_sensor_gyro_3d hid_sensor_rotation hid_sensor_trigger vfat hid_sensor_iio_common industrialio_triggered_buffer fat kfifo_buf drm_kms_helper tpm_crb industrialio cec tpm_tis ucsi_acpi processor_thermal_device i2c_algo_bit tpm_tis_core typec_ucsi intel_rapl_common tpm intel_soc_dts_iosf typec rng_core button soc_button_array int3403_thermal int340x_thermal_zone intel_hid acpi_pad int3400_thermal sparse_keymap intel_pmc_core acpi_tad acpi_thermal_rel ac msr parport_pc drm ppdev lp parport fuse configfs efivarfs ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 dm_crypt dm_mod raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq hid_sensor_custom libcrc32c crc32c_generic raid1 hid_sensor_hub raid0 multipath
[ 59.316864] linear md_mod intel_ishtp_hid wacom usbhid hid_generic nvme crc32_pclmul crc32c_intel rtsx_pci_sdmmc nvme_core mmc_core t10_pi ghash_clmulni_intel crc_t10dif crct10dif_generic crct10dif_pclmul crct10dif_common aesni_intel xhci_pci libaes crypto_simd xhci_hcd psmouse rtsx_pci cryptd vmd glue_helper usbcore thunderbolt intel_lpss_pci i2c_i801 intel_lpss intel_ish_ipc i2c_smbus idma64 intel_ishtp i2c_hid usb_common hid wmi battery video
[ 59.316899] CPU: 2 PID: 974 Comm: systemd-udevd Tainted: G I 5.10.0-2-amd64 #1 Debian 5.10.9-1
[ 59.316901] Hardware name: Dell Inc. XPS 13 9310 2-in-1/02P55J, BIOS 1.0.3 10/05/2020
[ 59.316968] RIP: 0010:intel_tc_port_init+0x10c/0x170 [i915]
[ 59.316974] Code: 4c 8b 67 50 4d 85 e4 75 03 4c 8b 27 e8 6d b1 13 c9 48 c7 c1 10 54 f9 c0 4c 89 e2 48 c7 c7 bd 16 fb c0 48 89 c6 e8 14 75 39 c9 <0f> 0b 89 e8 c1 e8 1f 01 e8 d1 f8 89 83 48 0e 00 00 89 e8 c1 e8 1f
[ 59.316975] RSP: 0018:ffffc0f5804b3ac0 EFLAGS: 00010282
[ 59.316979] RAX: 0000000000000000 RBX: ffff9af912039000 RCX: ffff9afa87698a08
[ 59.316980] RDX: 00000000ffffffd8 RSI: 0000000000000027 RDI: ffff9afa87698a00
[ 59.316982] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffc0f5804b38e0
[ 59.316983] R10: ffffc0f5804b38d8 R11: ffffffff8b0cb368 R12: ffff9af901146110
[ 59.316984] R13: 0000000000000003 R14: ffff9af912039000 R15: ffff9af912000000
[ 59.316987] FS: 00007f500d7e68c0(0000) GS:ffff9afa87680000(0000) knlGS:0000000000000000
[ 59.316989] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 59.316990] CR2: 00007f500ccded81 CR3: 00000001123ac002 CR4: 0000000000770ee0
[ 59.316991] PKRU: 55555554
[ 59.316992] Call Trace:
[ 59.317064] intel_ddi_init+0x4ad/0x870 [i915]
[ 59.317123] ? gen12_fwtable_read32+0x96/0x1e0 [i915]
[ 59.317190] intel_modeset_init_nogem+0x12b6/0x1d30 [i915]
[ 59.317249] ? gen12_fwtable_write32+0xcd/0x220 [i915]
[ 59.317302] ? gen12_fwtable_read32+0x96/0x1e0 [i915]
[ 59.317356] i915_driver_probe+0x5c2/0xc90 [i915]
[ 59.317363] ? vga_switcheroo_client_probe_defer+0x1f/0x40
[ 59.317413] ? i915_pci_probe+0x3f/0x150 [i915]
[ 59.317420] local_pci_probe+0x42/0x80
[ 59.317425] ? _cond_resched+0x16/0x40
[ 59.317427] pci_device_probe+0xfd/0x1b0
[ 59.317431] really_probe+0x205/0x460
[ 59.317434] driver_probe_device+0xe1/0x150
[ 59.317437] device_driver_attach+0xa1/0xb0
[ 59.317440] __driver_attach+0x8a/0x150
[ 59.317442] ? device_driver_attach+0xb0/0xb0
[ 59.317444] ? device_driver_attach+0xb0/0xb0
[ 59.317447] bus_for_each_dev+0x78/0xc0
[ 59.317449] bus_add_driver+0x12b/0x1e0
[ 59.317452] driver_register+0x8b/0xe0
[ 59.317454] ? 0xffffffffc1093000
[ 59.317510] i915_init+0x5d/0x70 [i915]
[ 59.317515] do_one_initcall+0x44/0x1d0
[ 59.317519] ? do_init_module+0x23/0x260
[ 59.317522] ? kmem_cache_alloc_trace+0xf5/0x200
[ 59.317525] do_init_module+0x5c/0x260
[ 59.317528] __do_sys_finit_module+0xb1/0x110
[ 59.317532] do_syscall_64+0x33/0x80
[ 59.317535] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 59.317537] RIP: 0033:0x7f500dc9f9b9
[ 59.317540] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a7 54 0c 00 f7 d8 64 89 01 48
[ 59.317542] RSP: 002b:00007ffeb5b62d88 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 59.317544] RAX: ffffffffffffffda RBX: 000055b218019940 RCX: 00007f500dc9f9b9
[ 59.317546] RDX: 0000000000000000 RSI: 00007f500de2ae2d RDI: 0000000000000010
[ 59.317547] RBP: 0000000000020000 R08: 0000000000000000 R09: 000055b21801e770
[ 59.317548] R10: 0000000000000010 R11: 0000000000000246 R12: 00007f500de2ae2d
[ 59.317550] R13: 0000000000000000 R14: 000055b21801a200 R15: 000055b218019940Attachments
Edited by Imre Deak