From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Tue, 14 Feb 2017 20:27:43 +0100 From: Pavel Machek To: Alan Stern , torvalds@linux-foundation.org Cc: kernel list , linux-usb@vger.kernel.org, gregkh@linuxfoundation.org, bhelgaas@google.com, linux-pci@vger.kernel.org Subject: Re: v4.10-rc8 (-rc6) boot regression on Intel desktop, does not boot after cold boots, boots after reboot Message-ID: <20170214192743.GA3869@amd> References: <20170203190414.GA3701@amd> <20170203205129.GA3791@amd> <20170203211854.GA3697@amd> <20170214175956.GA3587@amd> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="82I3+IH0IqGh5yIs" In-Reply-To: <20170214175956.GA3587@amd> Sender: linux-kernel-owner@vger.kernel.org List-ID: --82I3+IH0IqGh5yIs Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue 2017-02-14 18:59:56, Pavel Machek wrote: > Hi! >=20 > > > > > Hmm. I moved keyboard between USB ports, and now 4.10-rc6 no long= er > > > > > boots. v4.6 works ok. Let me try with keyboard unplugged... no, I > > > > > could not get it to work. I believe v4.9 and some v4.10-rc's work= ed, > > > > > but I'll have to double check. > > > >=20 > > > > But all the kernel versions worked when the keyboard was plugged in= to > > > > its original USB port? > > >=20 > > > Aha. So it looks difference is probably in "where is keyboard plugged > > > in" but in "reboot" vs. "cold boot". I did not do a cold boot in quite > > > a while :-(. > > >=20 > > > Booting to grub, then hitting ctrl-alt-del is enough to make it work.= Ouch. > > >=20 > > > It happens with current Linus' tree. > >=20 > > v4.10-rc6-feb3 : broken > > v4.9 : ok > > (v4.6 : ok) >=20 > Hmm. It hangs during PCI fixups, and it hangs in v4.10-rc8, too. =20 >=20 > With debug patch below, I get >=20 > ...1d.7: PCI fixup... pass 2 > ...1d.7: PCI fixup... pass 3 > ...1d.7: PCI fixup... pass 3 done >=20 > ...followed by hang. So yes, it looks USB related. >=20 > (Sometimes it hangs with some kind backtrace involving secondary CPU > startup, unfortunately useful info is off screen at that point). Forgot to say, 1d.7 is EHCI controller. 00:1d.7 USB controller: Intel Corporation NM10/ICH7 Family USB2 EHCI Controller (rev 01) Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --82I3+IH0IqGh5yIs Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlijWi8ACgkQMOfwapXb+vI4JQCgl8uaLPSJK+LIH9DNpb6M7ssx Nm8AnA3r2tQKlwyH0en4XYokKoQSVEXg =RNt3 -----END PGP SIGNATURE----- --82I3+IH0IqGh5yIs--