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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Screen does not wake after screen blank"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102224#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Screen does not wake after screen blank"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102224">bug 102224</a>
from <span class="vcard"><a class="email" href="mailto:arkh4mkn1ght@gmail.com" title="arkh4mkn1ght@gmail.com">arkh4mkn1ght@gmail.com</a>
</span></b>
<pre>After updating the BIOS of my laptop to the latest version and Upgrading to
Kernel 4.12.4 i'm still experiencing the issue. Same message in the logs:
Aug 06 11:26:02 localhost.localdomain kernel: [drm:i915_gem_idle_work_handler
[i915]] *ERROR* Timeout waiting for engines to idle
Screen is blank, unable to unblank it, keys when pressed are lit for a moment
and then turn off, unable to ssh into the machine though login asks for the
password.
This is definitely a bug in i915 rc6 support. Just in case my VAIO Z flip is
using a skylake CPU:
model name : Intel(R) Core(TM) i7-6567U CPU @ 3.30GHz
Kernel:
[root@localhost]# uname -a
Linux localhost.localdomain 4.12.4 #1 SMP Sat Aug 5 11:00:30 UYT 2017 x86_64
x86_64 x86_64 GNU/Linux
i915 module parameters used:
[root@localhost ]# systool -vm i915
Module = "i915"
Attributes:
coresize = "1277952"
initsize = "0"
initstate = "live"
refcnt = "21"
srcversion = "9F705B72B03F193BC3EF19B"
taint = ""
uevent = <store method only>
Parameters:
alpha_support = "N"
disable_display = "N"
disable_power_well = "1"
edp_vswing = "0"
enable_cmd_parser = "Y"
enable_dc = "-1"
enable_dp_mst = "Y"
enable_dpcd_backlight= "N"
enable_execlists = "1"
enable_fbc = "0"
enable_guc_loading = "0"
enable_guc_submission= "0"
enable_gvt = "N"
enable_hangcheck = "Y"
enable_ips = "1"
enable_ppgtt = "3"
enable_psr = "1"
enable_rc6 = "1"
error_capture = "Y"
fastboot = "N"
force_reset_modeset_test= "N"
guc_firmware_path = "(null)"
guc_log_level = "-1"
huc_firmware_path = "(null)"
inject_load_failure = "0"
invert_brightness = "0"
load_detect_test = "N"
lvds_channel_mode = "0"
lvds_use_ssc = "-1"
mmio_debug = "0"
modeset = "-1"
nuclear_pageflip = "N"
panel_ignore_lid = "1"
prefault_disable = "N"
reset = "Y"
semaphores = "0"
use_mmio_flip = "0"
vbt_sdvo_panel_type = "-1"
verbose_state_checks= "Y"
Again setting i915.emable_rc6 to 0 is NOT an option as it destroys battery
life. I hope this bug can be fixed cause its been a long time since i915 rc6
bugs have been around for skylake and kabylake CPU. I'm currently testing some
i915 module parameters and i will report back if the problem appears again</pre>
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