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Bug#568608: Regression: Slow VT switching



On Sun, Feb 28, 2010 at 10:52:44PM +0100, Cyril Brulebois wrote:

>> I'm attaching my current Xorg.0.log. If there's a different one you
>> want, just let me know.
> 
> Last lines in dmesg would be nice, especially if you could mark the
> last line you got before switching back to X.

Ok. In dmesg, the only two lines I get after switching back to X is

    [ 2806.180226] [drm] TV-14: set mode NTSC 480i 0
    [ 2806.360365] [drm] TV-14: set mode NTSC 480i 0

In Xorg.0.log, the extra lines produced by a VT switch, and then back
again are:

    (II) AIGLX: Suspending AIGLX clients for VT switch
    (II) Open ACPI successful (/var/run/acpid.socket)
    (II) AIGLX: Resuming AIGLX clients after VT switch
    (II) intel(0): No memory allocations
    (II) intel(0): EDID vendor "BOE", prod id 2203
    (II) intel(0): Printing DDC gathered Modelines:
    (II) intel(0): Modeline "1280x800"x0.0   69.30  1280 1328 1360 1440  800 803 809 823 -hsync -vsync (48.1 kHz)
    (WW) stylus: unable to read ISDV4 % data after 3 tries at (38400)
    (--) stylus: Wacom General ISDV4 tablet speed=38400 maxX=26312 maxY=16520 maxZ=255 resX=2540 resY=2540  tilt=disabled
    (--) stylus: top X=61 top Y=227 bottom X=26353 bottom Y=16581 resol X=2540 resol Y=2540
    (--) eraser: top X=61 top Y=227 bottom X=26353 bottom Y=16581 resol X=2540 resol Y=2540
    (II) "Power Button": Device reopened after 1 attempts.
    (II) "Video Bus": Device reopened after 1 attempts.
    (II) "Sleep Button": Device reopened after 1 attempts.
    (II) "AT Translated Set 2 keyboard": Device reopened after 1 attempts.
    (II) "PS/2 Generic Mouse": Device reopened after 1 attempts.
    (II) "Macintosh mouse button emulation": Device reopened after 1 attempts.
    (II) "ACPI Virtual Keyboard Device": Device reopened after 1 attempts.
    (II) "USB Optical Mouse": Device reopened after 1 attempts.
    
> If you look at your initial bug report, you can see a
> i915_gem_madvise_ioctl() being mentioned there, it would be nice to
> see what happens now, and whether this or that stuff happens on the
> way from or to X.

Unfortunately, I don't seem to get this message now.

I should add, I'm now using KMS. On 2.6.32-trunk, the problem persisted
with/without KMS, so I've only included the log files under KMS above.
If you like, I can reboot and give you the non-KMS logs too.

Finally, I've upgraded my system. Here are the relevant packages now
(same problem persists).

    ii  libc6                                   2.10.2-6
    ii  libdrm-intel1                           2.4.17-1
    ii  libdrm2                                 2.4.17-1
    ii  libpciaccess0                           0.11.0-1
    ii  libxext6                                2:1.1.1-2
    ii  libxfixes3                              1:4.0.4-1
    ii  libxv1                                  2:1.0.5-1
    ii  libxvmc1                                2:1.0.5-1
    ii  xserver-xorg-core                       2:1.7.5-1

Thanks,

GI

-- 
'Common' Proof Techniques:
4. Proof by example -- The author gives only the case n = 2 and suggests
that it contains most of the ideas of the general proof.

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