9.2-RC3 - suspend/resume causes slow system performance

Bengt Ahlgren bengta at sics.se
Wed Sep 25 15:09:31 UTC 2013


Now having some experience with my "new" TP X201 and Intel/KMS graphics,
I also ran into severe Xorg perfomance issues, but it was _not_
connected to suspend/resume, because it persisted after a clean reboot.

I plugged in a projector to the VGA port, and used xrandr.  The Xorg
server seemed to come to a halt, in practice unusable.  After the fact I
saw in the log file that there were tons of these messages:

[   136.238] (II) intel(0): EDID vendor "IFS", prod id 4354
[   136.238] (II) intel(0): Using hsync ranges from config file
[   136.238] (II) intel(0): Using vrefresh ranges from config file
[   136.238] (II) intel(0): Printing DDC gathered Modelines:
[   136.238] (II) intel(0): Modeline "1280x800"x0.0   83.40  1280 1344 1480 1680  800 801 804 828 -hsync +vsync (49.6 kHz eP)
[   136.238] (II) intel(0): Modeline "800x600"x0.0   40.00  800 840 968 1056  600 601 605 628 +hsync +vsync (37.9 kHz e)
[   136.238] (II) intel(0): Modeline "800x600"x0.0   36.00  800 824 896 1024  600 601 603 625 +hsync +vsync (35.2 kHz e)
[   136.238] (II) intel(0): Modeline "640x480"x0.0   31.50  640 656 720 840  480 481 484 500 -hsync -vsync (37.5 kHz e)
[   136.238] (II) intel(0): Modeline "640x480"x0.0   31.50  640 664 704 832  480 489 492 520 -hsync -vsync (37.9 kHz e)
[   136.238] (II) intel(0): Modeline "640x480"x0.0   30.24  640 704 768 864  480 483 486 525 -hsync -vsync (35.0 kHz e)
[   136.238] (II) intel(0): Modeline "640x480"x0.0   25.18  640 656 752 800  480 490 492 525 -hsync -vsync (31.5 kHz e)
[   136.238] (II) intel(0): Modeline "720x400"x0.0   28.32  720 738 846 900  400 412 414 449 -hsync +vsync (31.5 kHz e)
[   136.238] (II) intel(0): Modeline "1280x1024"x0.0  135.00  1280 1296 1440 1688  1024 1025 1028 1066 +hsync +vsync (80.0 kHz e)
[   136.238] (II) intel(0): Modeline "1024x768"x0.0   78.75  1024 1040 1136 1312  768 769 772 800 +hsync +vsync (60.0 kHz e)
[   136.238] (II) intel(0): Modeline "1024x768"x0.0   75.00  1024 1048 1184 1328  768 771 777 806 -hsync -vsync (56.5 kHz e)
[   136.238] (II) intel(0): Modeline "1024x768"x0.0   65.00  1024 1048 1184 1344  768 771 777 806 -hsync -vsync (48.4 kHz e)
[   136.238] (II) intel(0): Modeline "832x624"x0.0   57.28  832 864 928 1152  624 625 628 667 -hsync -vsync (49.7 kHz e)
[   136.238] (II) intel(0): Modeline "800x600"x0.0   49.50  800 816 896 1056  600 601 604 625 +hsync +vsync (46.9 kHz e)
[   136.238] (II) intel(0): Modeline "800x600"x0.0   50.00  800 856 976 1040  600 637 643 666 +hsync +vsync (48.1 kHz e)
[   136.238] (II) intel(0): Modeline "1152x864"x0.0  108.00  1152 1216 1344 1600  864 865 868 900 +hsync +vsync (67.5 kHz e)
[   136.238] (II) intel(0): Modeline "1280x720"x60.0   74.48  1280 1336 1472 1664  720 721 724 746 -hsync +vsync (44.8 kHz e)
[   136.238] (II) intel(0): Modeline "1280x960"x0.0  108.00  1280 1376 1488 1800  960 961 964 1000 +hsync +vsync (60.0 kHz e)
[   136.238] (II) intel(0): Modeline "1280x1024"x0.0  108.00  1280 1328 1440 1688  1024 1025 1028 1066 +hsync +vsync (64.0 kHz e)
[   136.238] (II) intel(0): Modeline "1366x768"x59.8   84.75  1366 1431 1567 1776  768 771 781 798 -hsync +vsync (47.7 kHz e)
[   136.238] (II) intel(0): Modeline "1440x900"x0.0  106.50  1440 1520 1672 1904  900 903 909 934 -hsync +vsync (55.9 kHz e)
[   136.238] (II) intel(0): Modeline "1400x1050"x0.0  121.75  1400 1488 1632 1864  1050 1053 1057 1089 -hsync +vsync (65.3 kHz e)
[   136.238] (II) intel(0): Modeline "1600x1200"x0.0  162.00  1600 1664 1856 2160  1200 1201 1204 1250 +hsync +vsync (75.0 kHz e)
[   136.238] (II) intel(0): Modeline "1680x1050"x0.0  146.25  1680 1784 1960 2240  1050 1053 1059 1089 -hsync +vsync (65.3 kHz e)

That is, the Xorg server constantly queried the display device for its
capabilities (perhaps on behalf of some client - I run KDE, so you never
know what it tries to do...).

This seems to be a somewhat known issue:

https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/310857

Is this something different, or is this a variant of the slowdown others
are seeing?

Bengt

Adrian Chadd <adrian at freebsd.org> writes:

> .. anything happening?
>
>
> -adrian
>
>
> On 2 September 2013 07:29, Adrian Chadd <adrian at freebsd.org> wrote:
>
>>
>> On 2 September 2013 07:25, Mike Harding <mvharding at gmail.com> wrote:
>>
>>> It's detailed in the ticket,  see
>>> http://www.freebsd.org/cgi/query-pr.cgi?pr=181632 and search for
>>> 'reverted'.
>>>
>>>
>> Ok. You and avg@ are digging into it deeper, so I'll leave it be for now.
>> I'll retest this on my test laptops when I'm back home.
>>
>>
>>
>> -adrian


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