Date: Fri, 19 Mar 2010 14:42:43 +1100 (EST) From: Ian Smith <smithi@nimnet.asn.au> To: Kevin Oberman <oberman@es.net> Cc: stable@freebsd.org, delphij@freebsd.org Subject: Re: DPMS broken on ThinkPad T43 since update for amd64 support Message-ID: <20100319142102.P85436@sola.nimnet.asn.au> In-Reply-To: <20100318153342.4450C1CC26@ptavv.es.net> References: <20100318153342.4450C1CC26@ptavv.es.net>
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On Thu, 18 Mar 2010, Kevin Oberman wrote: > Since the update of DPMS to support amd64 on March 2, it has broken > rather badly on my ThinkPad T43 laptop. The problem showed up on > 8-stable built on March 3 and is still present after an update to stable > of March 17. > > When in vty text mode, after the idle normal delay, the display blanks, > but the backlight remains on, so the P in DPMS seems to be less than > effective. At that point, the non-graphics display is dead. It never > comes back when characters are entered. I can't get the display to come > back without a reboot. > > I can, however, start X (and Gnome) and everything is fine. But > switching back to any vty results in a blank screen. > > Any idea what happened and if there is a fix or workaround? Any data I > can collect? Have you tried kldloading vesa? Might be a workaround until you find a proper fix? Had a similar issue with my T23 at one stage on 7.0, after a suspend/resume cycle, which hw.syscons.sc_no_suspend_vtswitch=1 also helped .. no idea how the T43 might respond to the latter. FWIW, Ian
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