Date: Fri, 2 Dec 2005 12:52:58 -0800 From: George Hartzell <hartzell@kestrel.alerce.com> To: Jacques Garrigue <garrigue@math.nagoya-u.ac.jp> Cc: freebsd-stable@freebsd.org, freebsd-mobile@freebsd.org Subject: Re: IBM T42 freezes when going to sleep under X11 Message-ID: <17296.46122.671120.884060@satchel.alerce.com> In-Reply-To: <20051202.110448.25479607.garrigue@math.nagoya-u.ac.jp> References: <20051114.175031.93019232.garrigue@math.nagoya-u.ac.jp> <20051202.110448.25479607.garrigue@math.nagoya-u.ac.jp>
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Jacques Garrigue writes: > From: Jacques Garrigue <garrigue@math.nagoya-u.ac.jp> > > I've got a strange problem with my IBM T42 / Radeon M10 setup. > > > > When using the 6.0-RELEASE kernel (including GENERIC), I cannot go to > > sleep when X11 is running: the machine freezes, display still on. I > > tried disabling DRI, but this does not seem to be the problem: I have > > no DRM anyway. > > > > On the other hand, everything works fines with a 6.0-RC1 kernel. > > Was there a big change in between, such that I need to change my > > configuration? > > I finally found the cause of my problems: there has been changes in > the em driver (Gb ethernet), such that the machine freezes when trying > to switch automatically from the X11 VT to the system console, before > going to sleep. The interaction is surprising, but clearly the problem > disappears when I remove "device em" from the kernel configuration, > and it reappears when I do "kldload if_em". Since I'm using only ath > (wireless) anyway, this is fine with me... > > A previous partial solution suggested to me was to add > hw.syscons.sc_no_suspend_vtswitch=1 > to sysctl.conf, but this means the screen gets garbled and I have to > do the switch by hand anyway, which is a real pain. > Worse still: the machine would still freeze when going to sleep while > the disk is active. > > The last step is to track down the bug in em, as it still seems to > be there in yesterday's STABLE. I don't seem to have any problem with my T42p using a kernel compiled on 11/29 11:21 My copy of if_em.c is: /*$FreeBSD: src/sys/dev/em/if_em.c,v 1.65.2.8 2005/11/25 14:11:59 glebius Exp $*/ g.
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