Bug 187091 - bluetooth needs 2s after resume, or else it causes delay/crash if the second suspend is delivered immediately - Lenovo Yoga 900
Summary: bluetooth needs 2s after resume, or else it causes delay/crash if the second ...
Status: RESOLVED DUPLICATE of bug 186201
Alias: None
Product: Power Management
Classification: Unclassified
Component: Hibernation/Suspend (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: Zhang Rui
URL:
Keywords:
Depends on:
Blocks: 178231
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Reported: 2016-11-07 02:38 UTC by Zhang Rui
Modified: 2016-11-09 06:17 UTC (History)
1 user (show)

See Also:
Kernel Version: 4.9-rc3
Subsystem:
Regression: No
Bisected commit-id:

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Description Zhang Rui 2016-11-07 02:38:50 UTC 
When doing the second suspend/resume, it seems that there is something wrong with snd_hda_codec_hdmi driver, and this causes 1.5 seconds delay when freezing userspace.

[  661.537461] PM: Preparing system for sleep (mem)
[  661.713838] Freezing user space processes ... 
[  661.808943] snd_hda_codec_hdmi hdaudioC0D2: HDMI: invalid ELD buf size -1
[  662.128935] snd_hda_codec_hdmi hdaudioC0D2: HDMI: invalid ELD buf size -1
[  662.448915] snd_hda_codec_hdmi hdaudioC0D2: HDMI: invalid ELD buf size -1
[  662.768931] snd_hda_codec_hdmi hdaudioC0D2: HDMI: invalid ELD buf size -1
[  663.055729] Bluetooth: hci0: Waiting for firmware download to complete
[  663.056019] Bluetooth: hci0: Firmware loaded in 1681458 usecs
[  663.056127] Bluetooth: hci0: Waiting for device to boot
[  663.073110] Bluetooth: hci0: Device booted in 16677 usecs
[  663.073120] Bluetooth: hci0: Found Intel DDC parameters: intel/ibt-11-5.ddc
[  663.075185] Bluetooth: hci0: Applying Intel DDC parameters completed
[  663.076173] Bluetooth: hci0: Setting Intel event mask failed (-16)
[  663.089031] snd_hda_codec_hdmi hdaudioC0D2: HDMI: invalid ELD buf size -1
[  663.136251] (elapsed 1.422 seconds) done.
[  663.136280] Freezing remaining freezable tasks ... (elapsed 0.002 seconds) done.

A comparison is the dmesg output in the first suspend
[  659.868411] PM: Preparing system for sleep (mem)
[  660.009238] Freezing user space processes ... (elapsed 0.002 seconds) done.
[  660.011332] Freezing remaining freezable tasks ... (elapsed 0.001 seconds) done.
Comment 1 Zhang Rui 2016-11-07 03:04:20 UTC 
This seems to be a racing problem if we deliver the second resume immediately after the first one.
Comment 2 Zhang Rui 2016-11-09 06:17:15 UTC 

*** This bug has been marked as a duplicate of bug 186201 ***
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