Ubuntu
kdebase package

1680x1050 resolution not displayed

Bug #44864 reported by manuel fernandez
12
Affects Status Importance Assigned to Milestone
kdebase (Ubuntu)
Invalid
Medium
Unassigned

Bug Description

Binary package hint: kcontrol

problem: 1680 x 1050 resolution cannot be obtained.

system: kubuntu dapper drake installed on
dell laptop inspiron 6400 with WXVGA 1680 x 1050 resolution.
computer has intel 945 graphics card.

trials to solve the problem:

system settings detects vesa driver + plug and play monitor
request to install intel 945 (810i driver) + dell 1680x1050 laptop display panel (16/10) allows maximum resolution of 1280x1024.

If monitor option "widescreen" is set, the 1680x1050 resolution appears in menu but upon xrestart the resolution is very low.

The 915resolution package does not solve the problem. The options list does not have 1680x1024 resolution (the closest match is 1600x1200). But even in this case, the resolution is not obtained.

Running sudo dpkg-reconfigure -phigh xserver-xorg does not solve the problem either.

Revision history for this message
manuel fernandez (mfg) wrote :

solution: correct 1680x1050 resolution obtained
dapper drake kubuntu on dell inspiron 6400 WSXGA+.

procedure:
install 915 resolution via adept manager
mimic the procedure decribed in https://wiki.ubuntu.com/i915Driver

run "sudo 915resolution -l"
Pickup an unused resolution ('4d' for me)
run "sudo 915resolution 4d 1650 1050 32"

Edit /etc/X11/xorg.conf
(a nice way of doing it is with konqueror on file xorg.conf right click and select "actions" and the "edit as root")

add in the section:
 Section "Device"
 identifier "Intel Corporation Mobile Integrated Graphics Controller"
the following line:

Option "ForceBIOS" "1920x1440=1680x1050"

and in the section:
Section "Monitor"
  identifier "Generic Monitor"
the following lines:

  modeline "1680x1050@60" 147.14 1680 1784 1968 2256 1050 1051 1054 1087 -hsync +vsync
  modeline "1680x1050@75" 188.07 1680 1800 1984 2288 1050 1051 1054 1096 -hsync +vsync

add to /etc/init.d/bootmisc.sh, before the last line ": exit 0"
/usr/sbin/915resolution 4d 1680 1050 32

add to /etc/default/915resolution

MODE=4d
# and set resolutions for the mode.
XRESO=1680
YRESO=1050

restart the computer and it should work.

Do not modify the display with System Settings because it will replace the xorg.conf file modified above. solution: correct 1680x1050 resolution obtained
dapper drake kubuntu on dell inspiron 6400 WSXGA+.

Revision history for this message
Andrew Ash (ash211) wrote :

Thanks for your bug report. I'm closing the bug since you got it working. To help get this working out of the box, please take a look at wiki.ubuntu.com/BetterWidescreenDetection

Changed in kdebase:
status: Unconfirmed → Rejected
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