Linux Kernel Freeze/Hang during boot on io scheduler cfq registered (default)

You'll see the following and the boot process will freeze:

io scheduler noop registered

io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)

I have struggled with this issue on various systems using all sorts of kernels, kernels where the issue should be "fixed".  As far as I can recall through debugging, this is a hang during pci_init.

It's beyond me why such a critical thing could happen and has not been fixed. 

Some Common Solutions (but don't work in many cases)

  1. Add kernel parameter "pci=noacpi" and/or disable ACPI in BIOS
  2. Add kernel paremeter "noapic" and/or disable IOAPIC in BIOS
  3. Add kernel parameters "i915.modeset=0 xforcevesa radeon.modeset=0 noswap nomodeset acpi=off irqpoll noapic noapm nodma nomce nolapic nosmp ip=frommedia vga=normal nosplash"

 


Tags:

linux, kernel, io, scheduler, cfq, registered, default, ll, noop, anticipatory, deadline, struggled, various, kernels, quot, debugging, pci_init, solutions, parameter, pci, noacpi, disable, acpi, bios, paremeter, noapic, ioapic, parameters, modeset, xforcevesa, radeon, noswap, nomodeset, irqpoll, noapm, nodma, nomce, nolapic, nosmp, ip, frommedia, vga, nosplash,

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