[Bug 91428] [HSW] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91428

Andreas Reis <andreas.reis at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #2 from Andreas Reis <andreas.reis at gmail.com> ---
Still occurs at drm-intel-nightly: 2015y-08m-19d-08h-17m-47s

Log is now:

    0.796590] [drm] Initialized drm 1.1.0 20060810
[    0.796600] ------------[ cut here ]------------
[    0.796603] WARNING: CPU: 0 PID: 1 at drivers/gpu/drm/drm_drv.c:570
drm_dev_alloc+0x254/0x320()
[    0.796603] Modules linked in:
[    0.796605] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.2.0-1-cu #1
[    0.796606] Hardware name: Gigabyte Technology Co., Ltd. G1.Sniper
M5/G1.Sniper M5, BIOS T01 02/03/2015
[    0.796607]  0000000000000000 000000004240aefe ffff88041d28bbb8
ffffffff81941f98
[    0.796608]  0000000000000000 0000000000000000 ffff88041d28bbf8
ffffffff810e5386
[    0.796609]  ffff88041d28bc08 ffff88041c0d6000 ffffffff81eb1540
ffff88041c6dc098
[    0.796611] Call Trace:
[    0.796613]  [<ffffffff81941f98>] dump_stack+0x4c/0x6e
[    0.796615]  [<ffffffff810e5386>] warn_slowpath_common+0x86/0xc0
[    0.796617]  [<ffffffff810e54ba>] warn_slowpath_null+0x1a/0x20
[    0.796618]  [<ffffffff815a16b4>] drm_dev_alloc+0x254/0x320
[    0.796620]  [<ffffffff815a369b>] drm_get_pci_dev+0x3b/0x1e0
[    0.796622]  [<ffffffff815bc224>] i915_pci_probe+0x34/0x50
[    0.796624]  [<ffffffff814b7799>] pci_device_probe+0x89/0xe0
[    0.796627]  [<ffffffff8167cfd4>] driver_probe_device+0x1f4/0x460
[    0.796628]  [<ffffffff8167d2d0>] __driver_attach+0x90/0xa0
[    0.796629]  [<ffffffff8167d240>] ? driver_probe_device+0x460/0x460
[    0.796630]  [<ffffffff8167abfc>] bus_for_each_dev+0x6c/0xc0
[    0.796631]  [<ffffffff8167c7ce>] driver_attach+0x1e/0x20
[    0.796633]  [<ffffffff8167c32b>] bus_add_driver+0x1eb/0x280
[    0.796634]  [<ffffffff8167dbe0>] driver_register+0x60/0xe0
[    0.796635]  [<ffffffff814b6ec9>] __pci_register_driver+0x49/0x50
[    0.796637]  [<ffffffff815a391b>] drm_pci_init+0xdb/0x100
[    0.796638]  [<ffffffff81f976cf>] ? mipi_dsi_bus_init+0x12/0x12
[    0.796639]  [<ffffffff81f97774>] i915_init+0xa5/0xad
[    0.796640]  [<ffffffff81002123>] do_one_initcall+0xb3/0x200
[    0.796642]  [<ffffffff81101f71>] ? parse_args+0x271/0x4a0
[    0.796644]  [<ffffffff81f4c1b3>] kernel_init_freeable+0x179/0x218
[    0.796645]  [<ffffffff819372b0>] ? rest_init+0x90/0x90
[    0.796646]  [<ffffffff819372be>] kernel_init+0xe/0xe0
[    0.796648]  [<ffffffff81948d5f>] ret_from_fork+0x3f/0x70
[    0.796649]  [<ffffffff819372b0>] ? rest_init+0x90/0x90
[    0.796651] ---[ end trace 38f2660276b3a315 ]---
[    0.796925] [drm] Memory usable by graphics device = 2048M
[    0.796926] [drm] VT-d active for gfx access
[    0.796927] checking generic (d0000000 300000) vs hw (d0000000 10000000)
[    0.796928] fb: switching to inteldrmfb from EFI VGA
[    0.796937] Console: switching to colour dummy device 80x25
[    0.796973] [drm] Replacing VGA console driver
[    0.803366] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    0.803367] [drm] Driver supports precise vblank timestamp query.
[    0.803372] [drm:intel_parse_bios] *ERROR* General definiton block child
device size is too small.
[    0.803379] [drm] DMAR active, disabling use of stolen memory
[    0.803420] vgaarb: device changed decodes:
PCI:0000:00:02.0,olddecodes=io+mem,decodes=none:owns=io+mem
[    0.871079] [drm:drm_calc_timestamping_constants] *ERROR* crtc 21: Can't
calculate constants, dotclock = 0!
[    0.876358] ACPI: Video Device [GFX0] (multi-head: yes  rom: no  post: no)
[    0.876634] acpi device:60: registered as cooling_device13
[    0.876671] input: Video Bus as
/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input2
[    0.876682] [drm] Initialized i915 1.6.0 20150731 for 0000:00:02.0 on minor
0

Removed i915_enable_rc6, thanks for the hint.

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