[Bug 90704] Desktop will black when sliding mouse in touchpad after switching tty in my skylake machine

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=90704

--- Comment #7 from vivianhu <vivianhu@linpus.com> ---
Hi jani, sorry to trouble you. ^-^ But we meet a new problem when we use
drm-intel-nightly branch,it will report an error and many crash info in dmesg,
please refer to attachment.
What is i915/skl_dmc_ver4.bin and where to get it? And Does it will cause any
problem if skl_dmc_ver4.bin is not loaded?  what is the cut info?


for example:
[    5.076518] i915 0000:00:02.0: Direct firmware load for
i915/skl_dmc_ver4.bin failed with error -2
[    5.076562] [drm:i915_firmware_load_error_print [i915]] *ERROR* failed to
load firmware i915/skl_dmc_ver4.bin (0)

------------[ cut here ]------------
[    6.127802] WARNING: CPU: 0 PID: 92 at drivers/gpu/drm/i915/intel_csr.c:462
assert_csr_loaded+0xa7/0x100 [i915]()
[    6.127803] CSR is not loaded.
[    6.127811] Modules linked in: i915(+) i2c_algo_bit video drm_kms_helper drm
i2c_core
[    6.127816] CPU: 0 PID: 92 Comm: kworker/u16:3 Not tainted
4.1.0-50.5.1.lp22.x86_64 #1
[    6.127818] Hardware name: LENOVO INVALID/VIUU4, BIOS D5CN07WW(T006)
02/11/2015
[    6.127826] Workqueue: events_unbound async_run_entry_fn
[    6.127831]  ffffffffa0186ff8 ffff88026f6ef738 ffffffff8176889d
0000000008ae08ae
[    6.127835]  ffff88026f6ef788 ffff88026f6ef778 ffffffff8107c32a
ffff88026f6ef768
[    6.127838]  ffff88026f180000 ffff88026f1802b0 0000000000000002
000000003000000f
[    6.127839] Call Trace:
[    6.127848]  [<ffffffff8176889d>] dump_stack+0x45/0x57
[    6.127853]  [<ffffffff8107c32a>] warn_slowpath_common+0x8a/0xc0
[    6.127857]  [<ffffffff8107c3a6>] warn_slowpath_fmt+0x46/0x50
[    6.127921]  [<ffffffffa01106be>] ? gen9_read32+0x6e/0x2f0 [i915]
[    6.127971]  [<ffffffffa00cf1d7>] assert_csr_loaded+0xa7/0x100 [i915]
[    6.128015]  [<ffffffffa00cddb3>] skl_set_power_well+0x743/0xac0 [i915]
[    6.128057]  [<ffffffffa00ce163>] skl_power_well_enable+0x13/0x20 [i915]
[    6.128099]  [<ffffffffa00ce426>] intel_display_power_get+0xa6/0x100 [i915]
[    6.128169]  [<ffffffffa015e77c>] intel_hdmi_set_edid+0x3c/0x100 [i915]
[    6.128236]  [<ffffffffa015e935>] intel_hdmi_detect+0x55/0xb0 [i915]
[    6.128246]  [<ffffffffa0083c90>]
drm_helper_probe_single_connector_modes_merge_bits+0x300/0x4c0 [drm_kms_helper]
[    6.128255]  [<ffffffffa0083e63>]
drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
[    6.128266]  [<ffffffffa008dde0>]
drm_fb_helper_probe_connector_modes.isra.3+0x50/0x70 [drm_kms_helper]
[    6.128277]  [<ffffffffa008ef5e>] drm_fb_helper_hotplug_event+0x5e/0xe0
[drm_kms_helper]
[    6.128287]  [<ffffffffa008f02c>]
drm_fb_helper_restore_fbdev_mode_unlocked+0x4c/0x80 [drm_kms_helper]
[    6.128295]  [<ffffffffa008f082>] drm_fb_helper_set_par+0x22/0x50
[drm_kms_helper]
[    6.128359]  [<ffffffffa014350a>] intel_fbdev_set_par+0x1a/0x60 [i915]
[    6.128364]  [<ffffffff81460044>] fbcon_init+0x4f4/0x580
[    6.128369]  [<ffffffff814c679c>] visual_init+0xbc/0x120
[    6.128373]  [<ffffffff814c8dd3>] do_bind_con_driver+0x163/0x330
[    6.128378]  [<ffffffff814c92dc>] do_take_over_console+0x11c/0x1c0
[    6.128384]  [<ffffffff8145b1c3>] do_fbcon_takeover+0x63/0xd0
[    6.128387]  [<ffffffff81460aed>] fbcon_event_notify+0x68d/0x7e0
[    6.128394]  [<ffffffff81099e8e>] notifier_call_chain+0x4e/0x80
[    6.128399]  [<ffffffff8109a1ed>] __blocking_notifier_call_chain+0x4d/0x70
[    6.128402]  [<ffffffff810c3c86>] ? pm_vt_switch_required+0x76/0xa0
[    6.128408]  [<ffffffff8109a226>] blocking_notifier_call_chain+0x16/0x20
[    6.128413]  [<ffffffff814668cb>] fb_notifier_call_chain+0x1b/0x20
[    6.128417]  [<ffffffff81468946>] register_framebuffer+0x1e6/0x320
[    6.128429]  [<ffffffffa008f324>] drm_fb_helper_initial_config+0x274/0x3d0
[drm_kms_helper]
[    6.128492]  [<ffffffffa014471b>] intel_fbdev_initial_config+0x1b/0x20
[i915]
[    6.128496]  [<ffffffff8109baaa>] async_run_entry_fn+0x4a/0x140
[    6.128500]  [<ffffffff81093622>] process_one_work+0x142/0x3f0
[    6.128503]  [<ffffffff810939eb>] worker_thread+0x11b/0x460
[    6.128507]  [<ffffffff810938d0>] ? process_one_work+0x3f0/0x3f0
[    6.128512]  [<ffffffff81098fb2>] kthread+0xd2/0xf0
[    6.128517]  [<ffffffff81098ee0>] ? kthread_create_on_node+0x170/0x170
[    6.128522]  [<ffffffff81770012>] ret_from_fork+0x42/0x70
[    6.128526]  [<ffffffff81098ee0>] ? kthread_create_on_node+0x170/0x170
[    6.128529] ---[ end trace d595c73cdcde54bc ]---

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