[gm45] Can't use external monitor at full resolution

[David Kedves]

Binary package hint: xserver-xorg-video-intel

This happened after upgrading my system from karmic to lucid.

I can't use my external monitor at full resolution (1920x1080) the maximal available resolution is 800x600 :-S.

kedz@kedz:~$ xrandr
Screen 0: minimum 320 x 200, current 2240 x 900, maximum 8192 x 8192
VGA1 connected 800x600+1440+0 (normal left inverted right x axis y axis) 477mm x 268mm
   800x600 85.1 72.2 75.0 60.3 56.2*
   640x480 85.0 75.0 72.8 59.9
   720x400 85.0
   640x400 85.1
   640x350 85.1
LVDS1 connected 1440x900+0+0 (normal left inverted right x axis y axis) 304mm x 190mm
   1440x900 60.2*+ 59.9
   1360x768 59.8
   1152x864 100.0 85.1 85.0 75.0 75.0 70.0 60.0
   1024x768 85.0 75.0 70.1 60.0
   832x624 74.6
   800x600 85.1 72.2 75.0 60.3 56.2
   640x480 85.0 72.8 75.0 59.9
   720x400 85.0
   640x400 85.1
   640x350 85.1
DP1 disconnected (normal left inverted right x axis y axis)

but, in xorg log i can see my monitor proper resultion:
(II) intel(0): Modeline "1920x1080"x0.0 148.50 1920 2008 2052 2200 1080 1084 1089 1125 +hsync -vsync (67.5 kHz)
and there is a weird message:
(II) intel(0): Not using default mode "1920x1080" (monitor doesn't support reduced blanking)
What is this? can't i force somehow to use this mode?

Btw, i tried an another monitor, (its an older LCD panel, and i can use its maximal resolution 1680x1050)....
And the weird thing is everything worked fine before update to lucid...

When i booting up my machine with connected external monitor, it is not usable too, monitor says "invalid hsync value" :-S
(i use encrypted rootfs i havent tried the booting without splash... i'll try it...)

I'm not sure about whether its a xserver-xorg-video-intel problem, maybe it is some DRM/kernel related issue...

ProblemType: Bug
Architecture: i386
Date: Fri Feb 19 10:17:31 2010
DistroRelease: Ubuntu 10.04
DkmsStatus: Error: [Errno 2] No such file or directory
MachineType: LENOVO 276554G
Package: xserver-xorg-video-intel 2:2.9.1-1ubuntu5
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: root=/dev/mapper/sda4_crypt ro quiet splash
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-13.18-generic-pae
RelatedPackageVersions:
 xserver-xorg 1:7.5+1ubuntu6
 libgl1-mesa-glx 7.7-0ubuntu8
 libdrm2 2.4.17-1ubuntu3
 xserver-xorg-video-intel 2:2.9.1-1ubuntu5
SourcePackage: xserver-xorg-video-intel
Uname: Linux 2.6.32-13-generic-pae i686
dmi.bios.date: 10/02/2009
dmi.bios.vendor: LENOVO
dmi.bios.version: 7VET80WW (3.10 )
dmi.board.name: 276554G
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7VET80WW(3.10):bd10/02/2009:svnLENOVO:pn276554G:pvrThinkPadT400:rvnLENOVO:rn276554G:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 276554G
dmi.product.version: ThinkPad T400
dmi.sys.vendor: LENOVO
system:
 distro: Ubuntu
 architecture: i686kernel: 2.6.32-13-generic-pae

[lspci]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
     Subsystem: Lenovo Device [17aa:2112]

[Geir Ove Myhr (gomyhr)]

Thank you for reporting this bug. In order to avoid a possible source of confusion and errors, could you move away the files /etc/X11/xorg.conf and ~/monitors.xml and try again? Then upload the output of `xrandr --verbose` and /var/log/Xorg.0.log as separate attachments (not comments) here.

[David Kedves (kedazo)]

An another observation:

Without xorg.conf and ~/.config/monitors.xml my monitor saying:
DSUB
OUT OF RANGE
53.5kHz / 85 Hz

(i haven't set any resolution...etc)

PS.: this message started to appear on my external monitor when the system asked for my encrypted root partition password... (at boot time...)

[David Kedves (kedazo)]

Today i found a workaround to get my external monitor working.
When I plug-in my monitor only after bootup (when my Gnome session is active),
the Display Preferences can properly recognize my monitor,
and i can use it at full resolution (1920x1080). :-D

Please let me know if You need any logs...

[madbiologist (me-again)]

The 2.6.33 kernel available at http://kernel.ubuntu.com/~kernel-ppa/mainline/ may help you. From the changelog:

commit b58db2c6dd18d35f59862d3352c86a0a58838bf3
Author: Adam Jackson
Date: Mon Feb 15 22:15:39 2010 +0000

    drm/edid: Fix interlaced detailed timings to be frame size, not field.

    cf. https://bugzilla.redhat.com/show_bug.cgi?id=533561

    Signed-off-by: Adam Jackson
    Signed-off-by: Dave Airlie

[David Kedves (kedazo)]

Hm... i checked with the 2.6.33 (non rc) kernel...

Not solved my problem, but the result is a bit better,
now i can't see the "OUT OF RANGE" message on my external screen while my ubuntu booting,
but now i can set only "1024x768" as maximum resolution....

And seems the frequency detection a bit better (with the current [ubuntu] kernel 2.6.32.14 its sets to 800x600@85Hz by default), now my monitor working in proper frequency... but i still can't use it at maximal resolution....
(except if i plug-in my monitor after boot-up...)

I'll try to check the logs.... (maybe i'll find some useful...)
(I attached my Xorg.log with 2.6.33 kernel...)

[Bryce Harrington (bryce)]

[This is an automatic notification.]

Thanks for reporting this bug to help making the Intel graphics driver
better. We hear from upstream that a number of bugs (possibly including
this one) have been fixed in the newer DRM code from the 2.6.33 kernel.
I don't know if your bug is one of the ones fixed in this release,
though, but we've prepared a PPA with this DRM update. Would you mind
installing this, rebooting, and testing if the original issue can be
reproduced with it or not?

The DRM PPA is here:

    https://edge.launchpad.net/~apw/+archive/red

Note there could be new bugs... please file these as new reports using
the command 'ubuntu-bug linux' (for kernel or DRM or KMS bugs) or
'ubuntu-bug xorg' if you suspect them to be X.org issues.

[David Kedves (kedazo)]

Hi, i tried the DRM PPA
(uname -a:
 Linux kedz 2.6.32-16-generic #23~drm33v5-Ubuntu SMP Thu Mar 4 17:21:31 UTC 2010 i686 GNU/Linux)
but the result is the same as in comment #8

So now 1024x768 is the maximum available resolution :-S
(i've attached the xrandr --verbose, the dmesg, and the Xorg.log with this kernel..)

[madbiologist (me-again)]

I think I may have found another workaround. If possible, try doing it the old-school way - add/update monitor and screen sections in your xorg.conf based on the mode info in your xorg.log, similar to comment 17 in the fdo bug at http://bugs.freedesktop.org/show_bug.cgi?id=17255
This is similar to what is described on the Ubuntu Troubleshooting Resolution Problems wiki at https://wiki.ubuntu.com/X/Troubleshooting/Resolution

You may also need the 2.6.33 kernel (or it's DRM as mentioned by Bryce in comment 10) to get around the (II) intel(0): Not using default mode "1920x1080" (monitor doesn't support reduced blanking) error.

[Bryce Harrington (bryce)]

Thanks for testing; this should go upstream. Setting to Confirmed for now.

[sancelot (sancelot)]

We have had some problems migrating some machines, the only way was adding :
   Option “IgnoreEDID” “true”
in xorg.conf

[David Kedves (kedazo)]

I just did an update/upgrade to maverick (10.10), everything works fine again!