On 1/20/06, Fong Vang <sudoyang at gmail.com> wrote: > We've narrowed this down to the serial port. Whenever we have > anything plugged into the serial port, the system hangs. At the local > login prompt, it hangs after entering the user name and hitting enter. > > USB keyboard still responds because you can still use ALT-Tab to > switch to other virtual terminals. > > Again, nothing on screen. silent. > > This is reported by mgetty in the logs: > > 01/20 22:45:04 yS0 mgetty: experimental test release 1.1.31-Jul24 > 01/20 22:45:04 yS0 check for lockfiles > 01/20 22:45:04 yS0 locking the line > 01/20 22:45:35 yS0 WARNING: DCD line still active, check modem > settings (AT&Dx)01/20 22:45:35 yS0 lowering DTR to reset Modem > 01/20 22:45:36 yS0 waiting... > 01/20 22:46:11 ##### failed dev=ttyS0, pid=5865, got signal 1, exiting > > 01/20 22:46:11 yS0 mgetty: experimental test release 1.1.31-Jul24 > 01/20 22:46:11 yS0 check for lockfiles > 01/20 22:46:11 yS0 locking the line > 01/20 22:47:13 yS0 WARNING: DCD line still active, check modem > settings (AT&Dx)01/20 22:47:13 yS0 lowering DTR to reset Modem > 01/20 22:47:13 ##### failed dev=ttyS0, pid=5898, got signal 15, exiting All our CentOS 4.1 systems have this problem -- regardless of hardware. Disabling mgetty allows us to use the systems after plugging in the serial connection. > > On 1/20/06, Fong Vang <sudoyang at gmail.com> wrote: > > On 1/20/06, Rodrigo Barbosa <rodrigob at suespammers.org> wrote: > > > -----BEGIN PGP SIGNED MESSAGE----- > > > Hash: SHA1 > > > > > > On Fri, Jan 20, 2006 at 08:38:09AM -0000, Plant, Dean wrote: > > > > Rodrigo Barbosa wrote: > > > > >>> Have you tried disabling hyperthreading? I had suffered this problem > > > > >>> when we started buying Intel Xeon's, disabling HT'ing seemed to fix > > > > >>> the problem for me. > > > > >> > > > > >> Some people suggested that too. I'm asking for two of these systems > > > > >> to be sent back from our remote data center. I'll try it then. > > > > >> > > > > >> Did you just ended up running without hyperthreading? Did you ever > > > > >> find a solution? It seems an awful waste if you can't use it. > > > > > > > > > > Disabling HT only solves it on single processor systems. > > > > > > > > In my case it fixed our dual processor systems (Dell PE2650) but to be > > > > honest I was never quite sure if it was an OS patch or HT'ing. I just > > > > disable HT'ing, build and they just work, I have not seen this problem > > > > for a while now. > > > > > > Did't solve for me on a Dual Xeon. The problem was reduced, happens > > > less frequently, but still happens :( > > > > I disabled hyperthreading... it is still hanging. > > > > > - -- > > > Rodrigo Barbosa <rodrigob at suespammers.org> > > > "Quid quid Latine dictum sit, altum viditur" > > > "Be excellent to each other ..." - Bill & Ted (Wyld Stallyns) > > > > > > -----BEGIN PGP SIGNATURE----- > > > Version: GnuPG v1.4.1 (GNU/Linux) > > > > > > iD8DBQFD0Q2DpdyWzQ5b5ckRAri/AJ9DEDPlWNKrT9S7Yha4NImPVw+yaACeMQuO > > > /KnaeI7ZJbM4uFskZPe7vyA= > > > =OyJl > > > -----END PGP SIGNATURE----- > > > _______________________________________________ > > > CentOS mailing list > > > CentOS at centos.org > > > http://lists.centos.org/mailman/listinfo/centos > > > > > >