Posted too soon. Some time (kernel timestamps say a few minutes) after the successful boot the console spewed another stack dump and the machine hung. -Tony brk-bdx-01 login: [ 364.922549] ------------[ cut here ]------------ [ 364.927987] mgag200 0000:08:00.0: [drm] drm_WARN_ON(pipe >= dev->num_crtcs) [ 364.928157] WARNING: CPU: 46 PID: 3556 at drivers/gpu/drm/drm_vblank.c:1347 drm_crtc_vblank_off+0x250/0x270 [drm] [ 364.947651] Modules linked in: snd_seq_dummy snd_hrtimer snd_seq snd_seq_device snd_timer snd soundcore xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp nf_conntrack_tftp bridge stp llc 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 ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_raw iptable_security ip_set rfkill nf_tables nfnetlink ip6table_filter ip6_tables iptable_filter sunrpc vfat fat intel_rapl_msr intel_rapl_common intel_uncore_frequency intel_uncore_frequency_common sb_edac x86_pkg_temp_thermal intel_powerclamp coretemp iTCO_wdt intel_pmc_bxt iTCO_vendor_support rapl ipmi_ssif intel_cstate intel_uncore acpi_ipmi joydev pcspkr ipmi_si i2c_i801 mei_me ipmi_devintf i2c_smbus lpc_ich mei ioatdma wmi ipmi_msghandler acpi_pad zram ip_tables crct10dif_pclmul crc32_pclmul mgag200 [ 364.948006] crc32c_intel i2c_algo_bit ghash_clmulni_intel drm_shmem_helper sha512_ssse3 drm_kms_helper sha256_ssse3 sha1_ssse3 mpt3sas ixgbe raid_class mdio drm scsi_transport_sas dca fuse [ 365.066964] CPU: 46 UID: 42 PID: 3556 Comm: gnome-shell Tainted: G W 6.12.0-rc2+ #171 [ 365.077283] Tainted: [W]=WARN [ 365.080617] Hardware name: Intel Corporation BRICKLAND/BRICKLAND, BIOS BRBDXSD1.86B.0338.V01.1603162127 03/16/2016 [ 365.092189] RIP: 0010:drm_crtc_vblank_off+0x250/0x270 [drm] [ 365.098473] Code: 4c 8b 67 50 4d 85 e4 75 03 4c 8b 27 e8 e9 be 01 d6 48 c7 c1 78 9b b1 c0 4c 89 e2 48 c7 c7 1e d6 b1 c0 48 89 c6 e8 f0 8f 60 d5 <0f> 0b 48 83 c4 20 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 66 [ 365.119464] RSP: 0018:ffffbd1ca3d87b20 EFLAGS: 00010282 [ 365.125316] RAX: 000000000000003f RBX: ffff9ddf0a498000 RCX: 0000000000000000 [ 365.133297] RDX: 0000000000000002 RSI: ffffffff97a00e78 RDI: 00000000ffffffff [ 365.141283] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffbd1ca3d879e0 [ 365.149274] R10: ffffbd1ca3d879d8 R11: ffff9e12011fffe8 R12: ffff9df257758df0 [ 365.157266] R13: ffff9ddf0a4993f0 R14: ffff9ddf05087a00 R15: ffffffffc0b726c0 [ 365.165244] FS: 00007f2ae47fad80(0000) GS:ffff9deb61d00000(0000) knlGS:0000000000000000 [ 365.174299] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 365.180736] CR2: 00000be199403000 CR3: 00000000127a8001 CR4: 00000000003706f0 [ 365.188726] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 365.196718] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 365.204709] Call Trace: [ 365.207462] <TASK> [ 365.209829] ? __warn+0x90/0x1a0 [ 365.213469] ? drm_crtc_vblank_off+0x250/0x270 [drm] [ 365.219104] ? report_bug+0x1c3/0x1d0 [ 365.223226] ? handle_bug+0x5b/0xa0 [ 365.227150] ? exc_invalid_op+0x14/0x70 [ 365.231455] ? asm_exc_invalid_op+0x16/0x20 [ 365.236159] ? drm_crtc_vblank_off+0x250/0x270 [drm] [ 365.241762] ? _raw_spin_unlock_irq+0x24/0x50 [ 365.246653] ? lockdep_hardirqs_on+0x7b/0x100 [ 365.251549] mgag200_crtc_helper_atomic_disable+0xf/0x160 [mgag200] [ 365.258576] disable_outputs+0x246/0x360 [drm_kms_helper] [ 365.264671] drm_atomic_helper_commit_tail+0x1a/0x80 [drm_kms_helper] [ 365.271896] mgag200_mode_config_helper_atomic_commit_tail+0x28/0x40 [mgag200] [ 365.279998] commit_tail+0x94/0x130 [drm_kms_helper] [ 365.285578] drm_atomic_helper_commit+0x13e/0x170 [drm_kms_helper] [ 365.292513] drm_atomic_commit+0x97/0xb0 [drm] [ 365.297533] ? __pfx___drm_printfn_info+0x10/0x10 [drm] [ 365.303439] drm_mode_atomic_ioctl+0x995/0xb80 [drm] [ 365.309061] ? __pfx_drm_mode_atomic_ioctl+0x10/0x10 [drm] [ 365.315245] drm_ioctl_kernel+0x85/0xf0 [drm] [ 365.320183] drm_ioctl+0x23a/0x450 [drm] [ 365.324640] ? __pfx_drm_mode_atomic_ioctl+0x10/0x10 [drm] [ 365.330825] ? __pfx___fget_files+0xb/0x10 [ 365.335438] __x64_sys_ioctl+0x8a/0xc0 [ 365.339656] do_syscall_64+0x73/0x190 [ 365.343780] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 365.349445] RIP: 0033:0x7f2ae87280ab [ 365.353462] Code: ff ff ff 85 c0 79 9b 49 c7 c4 ff ff ff ff 5b 5d 4c 89 e0 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 9d bd 0c 00 f7 d8 64 89 01 48 [ 365.374448] RSP: 002b:00007ffc89bc33c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 365.382925] RAX: ffffffffffffffda RBX: 00007ffc89bc3410 RCX: 00007f2ae87280ab [ 365.390908] RDX: 00007ffc89bc3410 RSI: 00000000c03864bc RDI: 000000000000000b [ 365.398904] RBP: 00000000c03864bc R08: 0000000000000002 R09: 0000000000000002 [ 365.406901] R10: 00007f2ae87f4a00 R11: 0000000000000246 R12: 0000564bfe3dcc80 [ 365.414889] R13: 000000000000000b R14: 0000564bfdead540 R15: 0000564bfdb6b5d0 [ 365.422914] </TASK> [ 365.425379] irq event stamp: 1043639 [ 365.429393] hardirqs last enabled at (1043651): [<ffffffff96183fae>] __up_console_sem+0x5e/0x70 [ 365.439231] hardirqs last disabled at (1043662): [<ffffffff96183f93>] __up_console_sem+0x43/0x70 [ 365.449074] softirqs last enabled at (1043676): [<ffffffff960dac91>] __irq_exit_rcu+0xa1/0x110 [ 365.458818] softirqs last disabled at (1043671): [<ffffffff960dac91>] __irq_exit_rcu+0xa1/0x110 [ 365.468548] ---[ end trace 0000000000000000 ]--- -----Original Message----- From: Luck, Tony Sent: Friday, October 11, 2024 9:37 AM To: Thomas Zimmermann <tzimmermann@xxxxxxx> Cc: jfalempe@xxxxxxxxxx; airlied@xxxxxxxxxx; sam@xxxxxxxxxxxx; emil.l.velikov@xxxxxxxxx; maarten.lankhorst@xxxxxxxxxxxxxxx; mripard@xxxxxxxxxx; airlied@xxxxxxxxx; daniel@xxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx Subject: RE: [PATCH v5 0/7] drm/mgag200: Implement VBLANK support Progress! My system now boots. But there's one WARN_ON dump along the way to the "login:" prompt. Thanks -Tony --- [ 33.111505] Console: switching to colour dummy device 80x25 [ 33.119581] mgag200 0000:08:00.0: vgaarb: deactivate vga console [ 33.139574] [drm] Initialized mgag200 1.0.0 for 0000:08:00.0 on minor 0 [ 33.157665] fbcon: mgag200drmfb (fb0) is primary device [ 33.196490] ixgbe 0000:03:00.1: Multiqueue Enabled: Rx Queue count = 63, Tx Queue count = 63 XDP Queue count = 0 [ 33.281367] ixgbe 0000:03:00.1: 16.000 Gb/s available PCIe bandwidth, limited by 5.0 GT/s PCIe x4 link at 0000:00:03.2 (capable of 32.000 Gb/s with 5.0 GT/s PCIe x8 link) [ 33.282519] ------------[ cut here ]------------ [ 33.282550] mgag200 0000:08:00.0: [drm] drm_WARN_ON(pipe >= dev->num_crtcs) [ 33.282610] WARNING: CPU: 123 PID: 1774 at drivers/gpu/drm/drm_vblank.c:1488 drm_crtc_vblank_on_config+0x1b5/0x210 [drm] [ 33.282687] Modules linked in: crct10dif_pclmul crc32_pclmul mgag200(+) crc32c_intel i2c_algo_bit ghash_clmulni_intel drm_shmem_helper sha512_ssse3 drm_kms_helper sha256_ssse3 sha1_ssse3 mpt3sas ixgbe(+) raid_class mdio drm scsi_transport_sas dca fuse [ 33.282712] CPU: 123 UID: 0 PID: 1774 Comm: systemd-udevd Not tainted 6.12.0-rc2+ #171 [ 33.282716] Hardware name: Intel Corporation BRICKLAND/BRICKLAND, BIOS BRBDXSD1.86B.0338.V01.1603162127 03/16/2016 [ 33.282718] RIP: 0010:drm_crtc_vblank_on_config+0x1b5/0x210 [drm] [ 33.282743] Code: 4c 8b 67 50 4d 85 e4 75 03 4c 8b 27 e8 34 ce 01 d6 48 c7 c1 78 9b b1 c0 4c 89 e2 48 c7 c7 1e d6 b1 c0 48 89 c6 e8 3b 9f 60 d5 <0f> 0b 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc 48 [ 33.282745] RSP: 0018:ffffbd1ca3f8f660 EFLAGS: 00010282 [ 33.282749] RAX: 000000000000003f RBX: ffff9ddf0a498000 RCX: 0000000000000000 [ 33.282751] RDX: 0000000000000002 RSI: ffffffff97a00e78 RDI: 00000000ffffffff [ 33.282753] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 33.282755] R10: 0000000000000001 R11: 0000000000000001 R12: ffff9df257758df0 [ 33.282757] R13: ffff9ddf0a4993f0 R14: ffffffffc0b726c0 R15: ffff9ddf05d33450 [ 33.282758] FS: 00007f66ab8e2b40(0000) GS:ffff9deb61f80000(0000) knlGS:0000000000000000 [ 33.282761] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.282763] CR2: 00007f66ab8c7c4b CR3: 000000000bc04003 CR4: 00000000003706f0 [ 33.282765] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.282766] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.282768] Call Trace: [ 33.282771] <TASK> [ 33.282773] ? __warn+0x90/0x1a0 [ 33.282785] ? drm_crtc_vblank_on_config+0x1b5/0x210 [drm] [ 33.282808] ? report_bug+0x1c3/0x1d0 [ 33.282819] ? handle_bug+0x5b/0xa0 [ 33.282824] ? exc_invalid_op+0x14/0x70 [ 33.282827] ? asm_exc_invalid_op+0x16/0x20 [ 33.282839] ? drm_crtc_vblank_on_config+0x1b5/0x210 [drm] [ 33.282862] ? mgag200_crtc_set_gamma_linear+0x17a/0x190 [mgag200] [ 33.282868] ? mgag200_enable_display+0x13b/0x160 [mgag200] [ 33.282876] drm_crtc_vblank_on+0x28/0x40 [drm] [ 33.282898] drm_atomic_helper_commit_modeset_enables+0xa6/0x240 [drm_kms_helper] [ 33.282920] drm_atomic_helper_commit_tail+0x50/0x80 [drm_kms_helper] [ 33.282931] mgag200_mode_config_helper_atomic_commit_tail+0x28/0x40 [mgag200] [ 33.282951] commit_tail+0x94/0x130 [drm_kms_helper] [ 33.282963] drm_atomic_helper_commit+0x13e/0x170 [drm_kms_helper] [ 33.282975] drm_atomic_commit+0x97/0xb0 [drm] [ 33.282996] ? __pfx___drm_printfn_info+0x10/0x10 [drm] [ 33.283027] drm_client_modeset_commit_atomic+0x207/0x250 [drm] [ 33.283060] drm_client_modeset_commit_locked+0x5b/0x190 [drm] [ 33.283086] drm_client_modeset_commit+0x24/0x50 [drm] [ 33.283109] __drm_fb_helper_restore_fbdev_mode_unlocked+0x95/0xd0 [drm_kms_helper] [ 33.283122] drm_fb_helper_set_par+0x2e/0x40 [drm_kms_helper] [ 33.283132] fbcon_init+0x2a8/0x560 [ 33.283143] visual_init+0xc4/0x120 [ 33.283150] do_bind_con_driver.isra.0+0x1a1/0x3d0 [ 33.283158] do_take_over_console+0x10b/0x1a0 [ 33.283164] do_fbcon_takeover+0x5c/0xc0 [ 33.283167] fbcon_fb_registered+0x49/0x70 [ 33.283170] do_register_framebuffer+0x184/0x230 [ 33.283179] register_framebuffer+0x20/0x40 [ 33.283182] __drm_fb_helper_initial_config_and_unlock+0x33e/0x590 [drm_kms_helper] [ 33.283193] ? drm_client_register+0x33/0xc0 [drm] [ 33.283222] drm_fbdev_shmem_client_hotplug+0x6c/0xc0 [drm_shmem_helper] [ 33.283228] drm_client_register+0x7b/0xc0 [drm] [ 33.283254] mgag200_pci_probe+0x90/0x180 [mgag200] [ 33.283262] local_pci_probe+0x46/0xa0 [ 33.283269] pci_device_probe+0xb5/0x220 [ 33.283277] really_probe+0xd9/0x380 [ 33.283288] __driver_probe_device+0x78/0x150 [ 33.283293] driver_probe_device+0x1e/0x90 [ 33.283297] __driver_attach+0xd6/0x1d0 [ 33.283301] ? __pfx___driver_attach+0x10/0x10 [ 33.283305] bus_for_each_dev+0x66/0xa0 [ 33.283311] bus_add_driver+0x111/0x240 [ 33.283317] driver_register+0x5c/0x120 [ 33.283320] ? __pfx_mgag200_pci_driver_init+0x10/0x10 [mgag200] [ 33.283326] do_one_initcall+0x62/0x3a0 [ 33.283333] ? __kmalloc_cache_noprof+0x240/0x300 [ 33.283343] do_init_module+0x64/0x240 [ 33.283354] init_module_from_file+0x7a/0xa0 [ 33.283366] idempotent_init_module+0x15f/0x260 [ 33.283378] __x64_sys_finit_module+0x5a/0xb0 [ 33.283383] do_syscall_64+0x73/0x190 [ 33.283396] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 33.283399] RIP: 0033:0x7f66ac527e0d [ 33.283403] Code: c8 0c 00 0f 05 eb a9 66 0f 1f 44 00 00 f3 0f 1e fa 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 3b 80 0c 00 f7 d8 64 89 01 48 [ 33.283406] RSP: 002b:00007ffff0c752b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 [ 33.283410] RAX: ffffffffffffffda RBX: 0000557cd3b38d00 RCX: 00007f66ac527e0d [ 33.283412] RDX: 0000000000000000 RSI: 00007f66ac68132c RDI: 0000000000000010 [ 33.283414] RBP: 0000000000020000 R08: 0000000000000000 R09: 0000000000000000 [ 33.283416] R10: 0000000000000010 R11: 0000000000000246 R12: 00007f66ac68132c [ 33.283418] R13: 0000557cd3b18eb0 R14: 0000000000000007 R15: 0000557cd3b38f80 [ 33.283429] </TASK> [ 33.283431] irq event stamp: 45133 [ 33.283433] hardirqs last enabled at (45139): [<ffffffff96187784>] vprintk_emit+0x3d4/0x3e0 [ 33.283444] hardirqs last disabled at (45144): [<ffffffff96187737>] vprintk_emit+0x387/0x3e0 [ 33.283448] softirqs last enabled at (44822): [<ffffffff960dac91>] __irq_exit_rcu+0xa1/0x110 [ 33.283456] softirqs last disabled at (44817): [<ffffffff960dac91>] __irq_exit_rcu+0xa1/0x110 [ 33.283459] ---[ end trace 0000000000000000 ]--- [ 33.283494] Console: switching to colour frame buffer device 128x48 [ 33.379557] ixgbe 0000:03:00.1: MAC: 3, PHY: 0, PBA No: G36748-005 [ 33.399852] mgag200 0000:08:00.0: [drm] fb0: mgag200drmfb frame buffer device
