Date:   Mon, 17 Feb 2020 19:42:21 +0100
From:   sinisa <sinisa@...t.rs>
To:     linux-kernel@...r.kernel.org
Subject: Re: Linux 5.6-rc2


On 2020-02-16 22:32, Linus Torvalds wrote:
 > ...
 > Chris Wilson (19):
 >       drm/i915/pmu: Correct the rc6 offset upon enabling
 >       drm/i915/gem: Take local vma references for the parser
 >       drm/i915/selftests: Add a mock i915_vma to the mock_ring
 >       drm/i915/gt: Use the BIT when checking the flags, not the index
 >       drm/i915/execlists: Leave resetting ring to intel_ring
 >       drm/i915/gem: Store mmap_offsets in an rbtree rather than a 
plain list
 >       drm/i915: Don't show the blank process name for 
internal/simulated errors
 >       drm/i915/gem: Detect overflow in calculating dumb buffer size
 >       drm/i915: Check activity on i915_vma after confirming pin_count==0
 >       drm/i915: Stub out i915_gpu_coredump_put
 >       drm/i915: Tighten atomicity of i915_active_acquire vs 
i915_active_release
 >       drm/i915/gt: Acquire ce->active before ce->pin_count/ce->pin_mutex
 >       drm/i915/gem: Tighten checks and acquiring the mmap object
 >       drm/i915: Keep track of request among the scheduling lists
 >       drm/i915/gt: Allow temporary suspension of inflight requests
 >       drm/i915/execlists: Offline error capture
 >       drm/i915/execlists: Take a reference while capturing the guilty 
request
 >       drm/i915/execlists: Reclaim the hanging virtual request
 >       drm/i915: Mark the removal of the i915_request from the sched.link
 > ...

Something from here makes my Toshiba Portege Z30-A (CPU is i5-4210U with 
integrated graphics) to to only get black screen when loading i915 driver.

Happens the same in rc1 and rc2, works OK with all previous kernels.


Here is relevant part of the dmesg output:


[    4.643848] i915 0000:00:02.0: vgaarb: deactivate vga console
[    4.645363] Console: switching to colour dummy device 80x25
[    4.667372] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    4.667379] [drm] Driver supports precise vblank timestamp query.
[    4.667743] i915 0000:00:02.0: vgaarb: changed VGA decodes: 
olddecodes=io+mem,decodes=io+mem:owns=io+mem
[    4.682355] ------------[ cut here ]------------
[    4.682389] WARNING: CPU: 3 PID: 459 at 
drivers/gpu/drm/drm_atomic.c:296 drm_atomic_get_crtc_state+0xf8/0x110 [drm]
[    4.682394] Modules linked in: iTCO_wdt iTCO_vendor_support 
nls_iso8859_1 snd_hda_codec_realtek i915(+) fuse nls_cp437 
snd_hda_codec_generic vfat fat iwlwifi uvcvideo ledtrig_audio 
aesni_intel(+) drm_kms_helper videobuf2_vmalloc crypto_simd 
snd_hda_intel videobuf2_memops cec snd_intel_dspcfg rc_core 
videobuf2_v4l2 cryptd snd_hda_codec glue_helper videobuf2_common 
cfg80211 drm pcspkr videodev snd_hda_core wmi_bmof snd_hwdep snd_pcm 
toshiba_acpi mc e1000e snd_timer sparse_keymap fb_sys_fops syscopyarea 
sysfillrect industrialio lpc_ich snd sysimgblt i2c_algo_bit 
toshiba_bluetooth soundcore thermal rfkill intel_smartconnect ac button 
xfs libcrc32c xhci_pci xhci_hcd rtsx_pci_sdmmc mmc_core ehci_pci 
ehci_hcd usbcore crc32c_intel rtsx_pci serio_raw battery wmi video 
l2tp_ppp l2tp_netlink l2tp_core ip6_udp_tunnel udp_tunnel pppox sg 
ppp_mppe ppp_generic slhc libarc4 dm_multipath dm_mod scsi_dh_rdac 
scsi_dh_emc scsi_dh_alua
[    4.682455] CPU: 3 PID: 459 Comm: systemd-udevd Not tainted 
5.6.0-rc2-1.g327abc9-default #1 openSUSE Tumbleweed (unreleased)
[    4.682460] Hardware name: TOSHIBA PORTEGE Z30-A/PORTEGE Z30-A, BIOS 
Version 4.30   04/26/2018
[    4.682486] RIP: 0010:drm_atomic_get_crtc_state+0xf8/0x110 [drm]
[    4.682490] Code: 89 2c 11 48 89 98 f0 01 00 00 48 8b 4d 20 8b 55 60 
e8 2c aa 00 00 48 8b 04 24 48 83 c4 08 5b 5d 41 5c c3 48 98 e9 4e ff ff 
ff <0f> 0b e9 28 ff ff ff 48 c7 c0 f4 ff ff ff e9 3b ff ff ff 0f 1f 44
[    4.682497] RSP: 0000:ffffaa5bc04338a8 EFLAGS: 00010246
[    4.682500] RAX: 0000000000000000 RBX: ffff9c97862c1000 RCX: 
ffff9c979101ed08
[    4.682504] RDX: 000000000000002d RSI: 0000000000000000 RDI: 
ffff9c97862c1000
[    4.682507] RBP: ffff9c97862c7800 R08: 0000000000000079 R09: 
0000000000000079
[    4.682510] R10: 000000000000002d R11: 0000000000000005 R12: 
0000000000000000
[    4.682513] R13: ffff9c97862c7800 R14: ffff9c97862c0800 R15: 
ffffffffc0ee0f80
[    4.682517] FS:  00007f65d2c92dc0(0000) GS:ffff9c9792ec0000(0000) 
knlGS:0000000000000000
[    4.682521] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    4.682524] CR2: 00007f016d25b610 CR3: 000000030f634004 CR4: 
00000000001606e0
[    4.682527] Call Trace:
[    4.682551]  drm_atomic_add_affected_connectors+0x2e/0x110 [drm]
[    4.682569]  drm_atomic_helper_check_modeset+0x492/0x770 [drm_kms_helper]
[    4.682641]  intel_atomic_check+0x93/0xcc0 [i915]
[    4.682657]  ? drm_atomic_helper_duplicate_state+0x148/0x170 
[drm_kms_helper]
[    4.682723]  intel_modeset_init+0xe55/0x1180 [i915]
[    4.682777]  i915_driver_probe+0x48e/0x580 [i915]
[    4.682784]  ? _cond_resched+0x15/0x30
[    4.682788]  ? mutex_lock+0xe/0x30
[    4.682839]  i915_pci_probe+0x54/0x140 [i915]
[    4.682845]  local_pci_probe+0x42/0x80
[    4.682851]  pci_device_probe+0x107/0x1b0
[    4.682856]  really_probe+0x147/0x3c0
[    4.682860]  driver_probe_device+0xb6/0x100
[    4.682864]  device_driver_attach+0x53/0x60
[    4.682867]  __driver_attach+0x8a/0x150
[    4.682870]  ? device_driver_attach+0x60/0x60
[    4.682874]  ? device_driver_attach+0x60/0x60
[    4.682878]  bus_for_each_dev+0x78/0xc0
[    4.682883]  bus_add_driver+0x14d/0x1f0
[    4.682887]  driver_register+0x6c/0xc0
[    4.682891]  ? 0xffffffffc0ff5000
[    4.682946]  i915_init+0x5d/0x70 [i915]
[    4.682952]  do_one_initcall+0x46/0x200
[    4.682957]  ? _cond_resched+0x15/0x30
[    4.682961]  ? kmem_cache_alloc_trace+0x189/0x280
[    4.682966]  ? do_init_module+0x23/0x230
[    4.682970]  do_init_module+0x5c/0x230
[    4.682973]  load_module+0x14b2/0x1650
[    4.682980]  ? __do_sys_init_module+0x16e/0x1a0
[    4.682983]  __do_sys_init_module+0x16e/0x1a0
[    4.682989]  do_syscall_64+0x64/0x240
[    4.682994]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[    4.682998] RIP: 0033:0x7f65d38a9d9a
[    4.683001] Code: 48 8b 0d e9 00 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 
66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 af 00 00 00 0f 
05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d b6 00 0c 00 f7 d8 64 89 01 48
[    4.683007] RSP: 002b:00007fffae341008 EFLAGS: 00000246 ORIG_RAX: 
00000000000000af
[    4.683012] RAX: ffffffffffffffda RBX: 0000563c1d4cb930 RCX: 
00007f65d38a9d9a
[    4.683015] RDX: 00007f65d356689d RSI: 00000000004bdde7 RDI: 
00007f65cd60c010
[    4.683018] RBP: 00007f65cd60c010 R08: 0000000000000000 R09: 
00007f65d32649e0
[    4.683022] R10: 0000000000000001 R11: 0000000000000246 R12: 
00007f65d356689d
[    4.683025] R13: 0000000000000000 R14: 0000563c1d22f0c0 R15: 
0000563c1d4cb930
[    4.683030] ---[ end trace 2b569a8878cd5b99 ]---



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Siniša Bandin

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