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Old 03-30-2014, 05:10 AM   #1
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Startup issues [Slackware 14.0]

Hello all,

Just to fill in some background info I had several distros on my laptop so this probably isn't related to Slackware per se.

I have trouble starting my laptop. Every now and then when I start it it gets stuck before LILO would show up. I get a black screen with a white cursor _ blinking for about a minute, then it jumps to the next line and it's done. A probably unrelated note is that when this happens I turn off my laptop, unplug it from the charger, shake it vigorously and start it again and it usually starts

The only information that I find might be related is that when the laptop does start it sometimes stops for several minutes and notifies me of this:

[    4.627235] rtc_cmos 00:05: RTC can wake from S4
[    4.627526] rtc_cmos 00:05: rtc core: registered rtc_cmos as rtc0
[    4.742061] usb 2-2: new high-speed USB device number 2 using ehci_hcd
[    4.895187] usb 2-2: New USB device found, idVendor=13d3, idProduct=5130
[    4.895293] usb 2-2: New USB device strings: Mfr=2, Product=1, SerialNumber=0
[    4.895396] usb 2-2: Product: USB 2.0 Camera
[    4.895496] usb 2-2: Manufacturer: Sonix Technology Co., Ltd.
[    5.235047] usb 5-4: new full-speed USB device number 2 using ohci_hcd
[    5.396148] usb 5-4: New USB device found, idVendor=0b05, idProduct=1751
[    5.396255] usb 5-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    5.396357] usb 5-4: Product: BT-253
[    5.396458] usb 5-4: Manufacturer: Broadcom Corp
[    5.396558] usb 5-4: SerialNumber: <<deleted from post>>
[   64.626037] INFO: rcu_sched detected stalls on CPUs/tasks: { 0} (detected by 1, t=60002 jiffies)
[   64.626309] Pid: 0, comm: swapper/1 Not tainted 3.2.29 #2
[   64.626411] Call Trace:
[   64.626512]  <IRQ>  [<ffffffff810b85a5>] __rcu_pending+0x3f5/0x400
[   64.626686]  [<ffffffff810b89af>] rcu_check_callbacks+0x7f/0x1c0
[   64.626790]  [<ffffffff81063378>] update_process_times+0x48/0x90
[   64.626894]  [<ffffffff81085206>] tick_sched_timer+0x66/0xc0
[   64.626997]  [<ffffffff8107843f>] __run_hrtimer+0x7f/0x1c0
[   64.627029]  [<ffffffff810851a0>] ? tick_nohz_handler+0xf0/0xf0
[   64.627029]  [<ffffffff81078dc7>] hrtimer_interrupt+0xf7/0x220
[   64.627029]  [<ffffffff81b31979>] smp_apic_timer_interrupt+0x69/0x99
[   64.627029]  [<ffffffff81b2fccb>] apic_timer_interrupt+0x6b/0x70
[   64.627029]  <EOI>  [<ffffffff8100a89a>] ? default_idle+0x5a/0x180
[   64.627029]  [<ffffffff8100aa6e>] amd_e400_idle+0xae/0xf0
[   64.627029]  [<ffffffff810009b6>] cpu_idle+0xf6/0x110
[   64.627029]  [<ffffffff81b149da>] start_secondary+0x1cf/0x1d6
[    4.630179] hpet1: lost 119098522 rtc interrupts
[  149.781416] rtc0: alarms up to one month, y3k, 114 bytes nvram, hpet irqs
To be more precise it stops right before the 'INFO: rcu_sched detected stalls' line. I copied here a bunch of lines as I don't know what relates to what.

I'd love to get some tips on this and I'd ALSO love if someone could point me out other things I should take into consideration from what my os tells me on startup. I will gladly send my whole dmesg I saved from the noted bad startup session if someone clarifies there's no sensitive data I should delete from it first.

Thank you for reading this far
Old 03-31-2014, 01:46 AM   #2
Didier Spaier
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Registered: Nov 2008
Location: Paris, France
Distribution: Slint64-14.2.1 on Lenovo Thinkpad W520
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Hello xificurC and welcome to LQ.

Maybe this document can give you some clue.


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