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<body><span class="vcard"><a class="email" href="mailto:andreas.reis@gmail.com" title="Andreas Reis <andreas.reis@gmail.com>"> <span class="fn">Andreas Reis</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW - [HSW] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91428">bug 91428</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEEDINFO
</td>
<td>NEW
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [HSW] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91428#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [HSW] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!"
href="https://bugs.freedesktop.org/show_bug.cgi?id=91428">bug 91428</a>
from <span class="vcard"><a class="email" href="mailto:andreas.reis@gmail.com" title="Andreas Reis <andreas.reis@gmail.com>"> <span class="fn">Andreas Reis</span></a>
</span></b>
<pre>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.</pre>
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