View All Attachments for Bug 89055

Attachment #113297
dmesg	text/plain	2015-02-10 05:53:03 UTC	431.58 KB	no flags	Details

Attachment #119531
kernel log OpenSUSE with kernel from OBS Kernel:linux-next repo drm.debug=0x0e	text/plain	2015-11-10 08:30:06 UTC	1.29 MB	no flags	Details

Attachment #121513
dmesg, xrandr, vbios, intel reg dump	application/octet-stream	2016-02-04 10:29:09 UTC	85.80 KB	no flags	Details

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Attachment #122960
APL-kms_pipe_crc_pipe-c.log	text/plain	2016-04-15 08:43:19 UTC	250.02 KB	no flags	Details

Attachment #123355
attachment-32584-0.html	text/html	2016-04-29 17:41:02 UTC	1.77 KB	no flags	Details

<div dir="ltr">Could someone please let me know how to apply this patchwork to mainstream kernel source?Â <div><br></div><div>I tried on the latest 4.6-rc5 and it failed. It did work on drm-intel-nightly though which is a not mainstream branch.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 26 April 2016 at 07:45,  <span dir="ltr">&lt;<a href="mailto:bugzilla-daemon@freedesktop.org" target="_blank">bugzilla-daemon@freedesktop.org</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
    
      
    
    <div>
      <p>
        </p><div>
            <b><a title="REOPENED - [SKL APL] WARN_ON(!wm_changed) hit in the WM code with multiple pipes enabled" href="https://bugs.freedesktop.org/show_bug.cgi?id=89055#c52" target="_blank">Comment # 52</a>
              on <a title="REOPENED - [SKL APL] WARN_ON(!wm_changed) hit in the WM code with multiple pipes enabled" href="https://bugs.freedesktop.org/show_bug.cgi?id=89055" target="_blank">bug 89055</a>
              from <span><a href="mailto:dwk128@gmail.com" title="dwk128@gmail.com" target="_blank">dwk128@gmail.com</a>
</span></b>
        <pre>I can confirm that this works for me on SKL, i5-6200U dell xps 13 9350. There
used to be a crash at every boot and two on suspend, with external HDMI plugged
in. I patched the drm-nightly kernel and compiled it manually.</pre>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div>~ Prasad Bhat<br></div></div></div>
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Attachment #123545
attachment-22347-0.html	text/html	2016-05-08 08:10:56 UTC	6.13 KB	no flags	Details

<div dir="ltr">@All: I found out a reasonable workaround till this issue gets fixed in mainstream. It is as follows:<div>1. Use modesetting driver and set option &#39;SWcursor&#39; to &#39;on&#39; in a custom xorg config file in /etc/xorg.conf.d. This step was already mentioned in one of the posts before, however, the next step is important to have sensible mouse pointer. Otherwise, you may mouse pointer which leaves behind very bad artifacts.</div><div>2. Use a desktop environment which uses XRender as compositing backend. KDE has an option to set it eventhough it is not default. I think XFCE has option too. I&#39;m not sure of GNOME, could not find one till now.</div><div><br></div><div>Step 2 leads to disabling of OpenGL backend which could mean performance might be a bit lower, but your system will be very stable and usable with this.<br></div><div><br></div><div>Hope this info helps some folks.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 7 May 2016 at 23:54,  <span dir="ltr">&lt;<a href="mailto:bugzilla-daemon@freedesktop.org" target="_blank">bugzilla-daemon@freedesktop.org</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
    
      
    
    <div>
      <p>
        </p><div>
            <b><a title="REOPENED - [SKL APL] WARN_ON(!wm_changed) hit in the WM code with multiple pipes enabled" href="https://bugs.freedesktop.org/show_bug.cgi?id=89055#c55" target="_blank">Comment # 55</a>
              on <a title="REOPENED - [SKL APL] WARN_ON(!wm_changed) hit in the WM code with multiple pipes enabled" href="https://bugs.freedesktop.org/show_bug.cgi?id=89055" target="_blank">bug 89055</a>
              from <span><a href="mailto:kman@fastmail.com" title="kman@fastmail.com" target="_blank">kman@fastmail.com</a>
</span></b>
        <pre>Been getting this in Fedora 23 (+ testing) 64-bit ever since upgrading the
hardware.

A desktop system, Intel i7 6700, built-in video, two monitors (HDMI + DVI).

The current kernel is:

Linux fiona 4.4.9-300.fc23.x86_64 #1 SMP Wed May 4 23:56:27 UTC 2016 x86_64
x86_64 x86_64 GNU/Linux

[    1.756194] ------------[ cut here ]------------
[    1.756271] WARNING: CPU: 0 PID: 135 at drivers/gpu/drm/i915/intel_pm.c:3601
skl_update_other_pipe_wm+0x1de/0x1f0 [i915]()
[    1.756273] WARN_ON(!wm_changed)
[    1.756285] Modules linked in: i915 e1000e i2c_algo_bit drm_kms_helper uas
ptp serio_raw usb_storage pps_core drm nvme video i2c_hid fjes
[    1.756290] CPU: 0 PID: 135 Comm: kworker/u16:3 Not tainted
4.4.9-300.fc23.x86_64 #1
[    1.756292] Hardware name: System manufacturer System Product Name/Z170-A,
BIOS 1702 01/28/2016
[    1.756300] Workqueue: events_unbound async_run_entry_fn
[    1.756305]  0000000000000286 000000007d583ed3 ffff88045e1174b0
ffffffff813b62ee
[    1.756308]  ffff88045e1174f8 ffffffffa0220bf8 ffff88045e1174e8
ffffffff810a4252
[    1.756311]  ffff88045e11761c ffff88045ba81000 ffff88045ba80000
0000000000000000
[    1.756312] Call Trace:
[    1.756322]  [&lt;ffffffff813b62ee&gt;] dump_stack+0x63/0x85
[    1.756329]  [&lt;ffffffff810a4252&gt;] warn_slowpath_common+0x82/0xc0
[    1.756333]  [&lt;ffffffff810a42ec&gt;] warn_slowpath_fmt+0x5c/0x80
[    1.756393]  [&lt;ffffffffa015bd6e&gt;] skl_update_other_pipe_wm+0x1de/0x1f0
[i915]
[    1.756448]  [&lt;ffffffffa015bfd2&gt;] skl_update_wm+0x252/0x750 [i915]
[    1.756501]  [&lt;ffffffffa01604de&gt;] intel_update_watermarks+0x1e/0x30 [i915]
[    1.756581]  [&lt;ffffffffa01c8b80&gt;] haswell_crtc_enable+0x370/0x870 [i915]
[    1.756656]  [&lt;ffffffffa01c4712&gt;] intel_atomic_commit+0x492/0x1420 [i915]
[    1.756694]  [&lt;ffffffffa00621ae&gt;] ? drm_atomic_check_only+0x18e/0x590 [drm]
[    1.756727]  [&lt;ffffffffa00625e7&gt;] drm_atomic_commit+0x37/0x60 [drm]
[    1.756742]  [&lt;ffffffffa00f21af&gt;] restore_fbdev_mode+0x22f/0x260
[drm_kms_helper]
[    1.756756]  [&lt;ffffffffa00f4383&gt;]
drm_fb_helper_restore_fbdev_mode_unlocked+0x33/0x80 [drm_kms_helper]
[    1.756767]  [&lt;ffffffffa00f43fd&gt;] drm_fb_helper_set_par+0x2d/0x50
[drm_kms_helper]
[    1.756847]  [&lt;ffffffffa01db39a&gt;] intel_fbdev_set_par+0x1a/0x60 [i915]
[    1.756853]  [&lt;ffffffff814283c0&gt;] fbcon_init+0x570/0x5f0
[    1.756858]  [&lt;ffffffff814a9eca&gt;] visual_init+0xca/0x130
[    1.756861]  [&lt;ffffffff814abd61&gt;] do_bind_con_driver+0x1c1/0x3a0
[    1.756865]  [&lt;ffffffff814ac279&gt;] do_take_over_console+0x149/0x1a0
[    1.756870]  [&lt;ffffffff81424227&gt;] do_fbcon_takeover+0x57/0xb0
[    1.756874]  [&lt;ffffffff81428e38&gt;] fbcon_event_notify+0x658/0x750
[    1.756878]  [&lt;ffffffff810c369a&gt;] notifier_call_chain+0x4a/0x70
[    1.756882]  [&lt;ffffffff810c39d7&gt;] __blocking_notifier_call_chain+0x47/0x60
[    1.756885]  [&lt;ffffffff810c3a06&gt;] blocking_notifier_call_chain+0x16/0x20
[    1.756890]  [&lt;ffffffff8142ea8b&gt;] fb_notifier_call_chain+0x1b/0x20
[    1.756896]  [&lt;ffffffff81430daf&gt;] register_framebuffer+0x20f/0x350
[    1.756909]  [&lt;ffffffffa00f46aa&gt;] drm_fb_helper_initial_config+0x28a/0x410
[drm_kms_helper]
[    1.756978]  [&lt;ffffffffa01dbe9b&gt;] intel_fbdev_initial_config+0x1b/0x20
[i915]
[    1.756984]  [&lt;ffffffff810c510a&gt;] async_run_entry_fn+0x4a/0x140
[    1.756988]  [&lt;ffffffff810bc709&gt;] process_one_work+0x159/0x430
[    1.756993]  [&lt;ffffffff810bca2e&gt;] worker_thread+0x4e/0x450
[    1.756997]  [&lt;ffffffff810bc9e0&gt;] ? process_one_work+0x430/0x430
[    1.757000]  [&lt;ffffffff810c27b8&gt;] kthread+0xd8/0xf0
[    1.757003]  [&lt;ffffffff810c26e0&gt;] ? kthread_worker_fn+0x160/0x160
[    1.757008]  [&lt;ffffffff817a128f&gt;] ret_from_fork+0x3f/0x70
[    1.757011]  [&lt;ffffffff810c26e0&gt;] ? kthread_worker_fn+0x160/0x160
[    1.757041] ---[ end trace fafafc83ac3f9b24 ]---</pre>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div>~ Prasad Bhat<br></div></div></div>
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