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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - No package C-states on Dell XPS 15 9570 after resume from deep sleep"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111623#c18">Comment # 18</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - No package C-states on Dell XPS 15 9570 after resume from deep sleep"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111623">bug 111623</a>
from <span class="vcard"><a class="email" href="mailto:don.hiatt@intel.com" title="Don Hiatt <don.hiatt@intel.com>"> <span class="fn">Don Hiatt</span></a>
</span></b>
<pre>It looks like once the driver is loaded with enable_guc=3, reloading the driver
with enable_guc=0 always fails and requires a reboot. This is what I was
running into earlier today.
Also, once the driver is loaded with enable_guc=0 we never get into rc6 as the
gpu is wedged. The only fix is to reboot or to load the driver with
enable_guc=3.
Same behavior with 'kbl_guc_32.0.3.bin'.
Looks to be a firmware issue.
--[load driver with enable_guc=3]---
[ 39.892295] [drm] GuC communication stopped <---- driver removed
--[reload driver with enable_guc=0]---
[ 57.712627] Setting dangerous option enable_guc - tainting kernel
[ 57.712988] i915 0000:00:02.0: Found 64MB of eDRAM
[ 57.712998] i915 0000:00:02.0: vgaarb: deactivate vga console
[ 57.714338] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 57.714339] [drm] Driver supports precise vblank timestamp query.
[ 57.715451] [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin
(v1.4)
[ 57.769281] i915 0000:00:02.0: GuC initialization failed -1
[ 57.769285] i915 0000:00:02.0: Enabling uc failed (-5)
[ 57.769291] i915 0000:00:02.0: Failed to initialize GPU, declaring it
wedged!</pre>
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