Arch Linux

hifi25nl

Member

Registered: 2011-05-07

Posts: 264

[SOLVED] Cannot boot from USB flash with kernel 3.15

I have a Ventura Ultra USB flash drive 120 GB.
I can boot fine with linux-lts and also with realtime linux-rt (3.14.3)  but I cannot boot with the last kernel in the repository.

The boot stops at "unable to find root device". I have tested it with Syslinux and Grub2.

I cannot find a solution: fstab and syslinux.cfg (or grub.cfg) are fine, since I can boot with the other kernels...

Last edited by hifi25nl (2014-06-28 22:06:42)

sirocco

Member

Registered: 2008-03-10

Posts: 149

Re: [SOLVED] Cannot boot from USB flash with kernel 3.15

Try to boot the kernel with maxcpus=1

hifi25nl

Member

Registered: 2011-05-07

Posts: 264

Re: [SOLVED] Cannot boot from USB flash with kernel 3.15

No, it is not working...

R00KIE

Forum Fellow

From: Between a computer and a chair

Registered: 2008-09-14

Posts: 4,734

Re: [SOLVED] Cannot boot from USB flash with kernel 3.15

Just a guess but it might be related with the reintroduction of the uas driver in the kernel, it seems there are still a few problems [1]. You might want to try to ignore uas for that specific drive and see if it works.

[1] https://bbs.archlinux.org/viewtopic.php?id=183190

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R00KIE
Tm90aGluZyB0byBzZWUgaGVyZSwgbW92ZSBhbG9uZy4K

hifi25nl

Member

Registered: 2011-05-07

Posts: 264

Re: [SOLVED] Cannot boot from USB flash with kernel 3.15

Your guess was right!
I have added ignore_uas.conf to /etc/modprobe.d with this line inside

options usb-storage quirks=0x174c:0x55aa:u

and now all is fine.

Thank you.