Re: still problems with intel video

Brandon Gooch wrote:
> On Thu, Mar 26, 2009 at 10:58 PM, Robert Noland <rnoland_at_freebsd.org> wrote:
>   
>> On Fri, 2009-03-27 at 14:11 +1100, Mattia Rossi wrote:
>>     
>>> Robert Noland wrote:
>>>       
>>>> On Thu, 2009-03-26 at 13:10 +0100, Michiel Boland wrote:
>>>>
>>>>         
>>>>> Hi. I still have problems with a very slow display after logging out of an X
>>>>> session and/or switching VTYs. The problem goes away if I add
>>>>> hw.pci.enable_msi=0 to /boot/loader.conf.
>>>>>
>>>>> Last csupped Mar 26 09:49 CET.
>>>>>
>>>>> System is Dell optiplex 745. Has built-in Intel Graphics Media Accelerator 950
>>>>>
>>>>> Anything I can do to help solve this problem?
>>>>>
>>>>>           
>>>> I'm going to try and work on getting better debugging info from the
>>>> intel driver.  I don't have access to any newer Intel hardware at the
>>>> moment, so testing is tricky.
>>>>
>>>> There is a tuneable for just msi on drm hw.drm.msi.
>>>>
>>>> robert.
>>>>
>>>>
>>>>         
>>> Yep, correct - here it is again - just had to log out of KDE, and after
>>> logging in again, everything was slow as hell.
>>> I didn't fiddle with the msi settings, just rebooted the machine, and
>>> everything is fine again.
>>> So there must be something that works the first time X is started, but
>>> upon restart stuffs up. Like some lock or reference which is not freed.
>>>       
>> There is a problem with restarting X on at least some Intel chips...
>> This is a different issue, I was trying to look into that a little bit
>> yesterday, but it kinda works on this 915 that I have, so I haven't
>> isolated what is getting messed up.  Again, vt switch, suspend/resume
>> are in the same ballpark, restart is not.
>>
>> robert.
>>
>>     
>>> Mat
>>>       
>>>>> _______________________________________________
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>>>>>
>>>>>           
>> --
>> Robert Noland <rnoland_at_FreeBSD.org>
>> FreeBSD
>>
>>     
>
> I have been switching to the vty at which I started X in order to
> terminate X. If I try to terminate X while I'm in it, it just "hangs"
> -- I have to switch to the vty, ctrl-c it, wait, then blindly key in a
> reboot to get my system back up. IIRC, this started happening after I
> upgraded to Xorg 7.4.
>
> I thought that Mattia might be doing the same thing as a work-around
> for the freezing intel-driven display thing, thus the X-to-vty switch
> "fix" of disabling msi...
>
> -Brandon
Hmm, just tested whether it's vty switching or restarting X that is 
problematic, and it seems it's both :(. It is not as unusable as it was 
when I couldn't type anymore, but everything gets definitely very slow 
after a restart of X or after switching to a vty and back. Didn't try 
suspend/resume though.

The controller says it's a: Intel Q35 SVGA controller.
Maybe it's of interest that the machine is a HP Compaq dc7800 
Convertible Minitower...

Thanks for looking into the problem - tell me if/how i can help with 
debugging (there are a couple of FreeBSD users with this same 
canfiguration here which will be very happy about a well working FreeBSD 
8 release :-))

Mat