Re: Booting time change between manual selection and default boot

[Andrei Borzenkov]

29.11.2015 20:25, chocho 92 пишет:
> 2015-11-29 18:15 GMT+01:00 Andrei Borzenkov <address@hidden>:
> 
>> 29.11.2015 20:08, chocho 92 пишет:
>>> 2015-11-29 17:19 GMT+01:00 Andrei Borzenkov <address@hidden>:
>>>
>>>> 29.11.2015 15:58, chocho 92 пишет:
>>>>> Hi everyone,
>>>>>
>>>>> I've just made a fresh install of linux mint on my pc on a new ssd
>>>> without
>>>>> any other operating system, and I've got a strange issue that I can't
>> get
>>>>> ride of it.
>>>>>
>>>>> If I let the pc boots alone it takes times and in the dmesg output we
>> can
>>>>> see that the boot process get stuck 64 seconds (between line 527 and
>> 528)
>>>>> dmesg output : paste.debian.net/hidden/3c25f07f
>>>>>
>>>>
>>>> Is GRUB menu displayed in this case?
>>>>
>>>
>>> No, in this case no grub menu displayed.
>>> But if I comment the two following lines :
>>>
>>> #GRUB_HIDDEN_TIMEOUT=0
>>> #GRUB_HIDDEN_TIMEOUT_QUIET=true
>>>
>>> The grub menu is then displayed. And if I then let the countdown go to 0
>>> I've got the same issue, with the 64 seconds pause in the boot process.
>>> Whereas if I press enter then there is no pause.
>>>
>>>
>>>
>> Do you have USB keyboard?
>>
>>
> Yes I've got USB keybord
> 

My best guess is that delay is caused by USB controller; when you press
any key during boot, controller is initialized by BIOS which explains delay.

But in any case, once kernel is loaded bootloader task is over; kernel
guys may give you more help in tracing what causes delay.