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Bug#823552: endless "supply vcc not found, using dummy regulator"



On Thu, 2016-05-05 at 23:29 +0200, Steinar H. Gunderson wrote:
> Package: linux-image-4.5.0-2-armmp-lpae
> Version: 4.5.2-1
> Severity: normal
> 
> Hi,
> 
> I'm installing an ODROID XU4 (Exynos 5422-based). After upgrading it to sid and
> installing 4.5.0-2-armmp-lpae (and generating the uInitrd myself, and updating
> boot.ini -- I'm not entirely sure if this can be done more automatically),

That should be handled by flash-kernel though I don't know whether it
supports this specific machine yet.

> the serial console shows tens of thousands of these messages on boot:
> 
> [   47.161428] exynos-dwc3 usb@12000000: no suspend clk specified               
> [   47.162811] usb_phy_generic.49646.auto supply vcc not found, using dummy regulator 
> [   47.163532] usb_phy_generic.49647.auto supply vcc not found, using dummy regulator
> 
> They appear to go on forever, blocking boot -- until I set the log level to 0
> to suppress them (using magic SysRq over the serial console), nothing else seems
> to happen on the machine.
> 
> As a reference point, this did not happen with 4.4.0-0.bpo.1-armmp from
> jessie-backports, but I'm unsure if this is because of the kernel or due to
> something in the initramfs differing between jessie and sid.

It *could* be due to changes in initramfs-tools.

Anyway, I'll leave this for the ARM porters to diagnose.

Ben.

-- 
Ben Hutchings
All the simple programs have been written, and all the good names taken.

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