DPMS broken on ThinkPad T43 since update for amd64 support

[Kevin Oberman]

On Mar 18, 2010, at 20:42, Ian Smith <smithi at nimnet.asn.au> wrote:

> 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.



Thanks, Ian, but it didn't help.  The  
hw.syscons.sc_no_suspend_vtswitch sysctl is only relevant to resuming  
from suspend and I think I was the one who suggested it to you. I used  
to have T23 & used it on that systeem.

Thanks for the suggestions, though.

Sent from my iPod
>