This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1768761
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1768761
Title:
linux-snapdragon: reduce EPROBEDEFER noise during boot
Status in linux package in Ubuntu:
Incomplete
Bug description:
IMPACT:
During boot, after the rootfs is mounted, the linux-snapdragon kernel
prints several lines like these:
...
[ 5.258027] qcom-apq8016-sbc 7702000.sound: error getting codec dai name
[ 5.258052] qcom-apq8016-sbc 7702000.sound: Error resolving dai links: -517
[ 5.274320] msm_dsi_manager_register: failed to register mipi dsi host for
DSI 0
[ 5.274451] msm 1a00000.mdss: failed to bind 1a98000.dsi (ops dsi_ops):
-517
[ 5.300115] qcom-apq8016-sbc 7702000.sound: error getting codec dai name
[ 5.300140] qcom-apq8016-sbc 7702000.sound: Error resolving dai links: -517
[ 5.733725] msm_dsi_manager_register: failed to register mipi dsi host for
DSI 0
[ 5.733841] msm 1a00000.mdss: failed to bind 1a98000.dsi (ops dsi_ops):
-517
[ 5.760228] qcom-apq8016-sbc 7702000.sound: error getting codec dai name
[ 5.760252] qcom-apq8016-sbc 7702000.sound: Error resolving dai links: -517
[ 6.146074] msm_dsi_manager_register: failed to register mipi dsi host for
DSI 0
...
these are the audio and drm modules failing to attach due to the
adv7511 i2c bridge missing - they will retry several times, until the
adv7511_drm is finally loaded and these messages disappear.
While both audio and video work fine in the end, these lines make
parsing the boot logs harder and might fool a user to think there's a
potential problem.
FIX:
To fix it, make the config DRM_I2C_ADV7511=y.
HOW TO REPRODUCE:
Boot a patched kernel and check the boot logs.
REGRESSION POTENTIAL:
Probably none.
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