Max resolution available is 1024x768, while I should expect 1280x1024

Question

The max resolution what I can choose is 1024x768. What shall I do to have 1280x1024 (max resolution of my monitor) option too?

My configuration:

a Siemens brand PC
Ubuntu 11.10 Oneiric Ocelot
Samsung SyncMater 913n TFT monitor via analog (D-Sub) connection

Graphics card is reported to be (lspci):

00:02.0 VGA compatible controller [0300]: Intel Corporation 82865G Integrated 
        Graphics Controller [8086:2572] (rev 02)

and lshw:

*-display
    description: VGA compatible controller
    product: 82865G Integrated Graphics Controller vendor: Intel Corporation
    physical id: 2
    bus info: pci@0000:00:02.0
    version: 02
    width: 32 bits
    clock: 33MHz
    capabilities: pm vga_controller bus_master cap_list rom
    configuration: driver=i915 latency=0
    resources: irq:16 memory:f0000000-f7ffffff memory:e0000000-e007ffff ioport:1000(size=8)

score 6 · Accepted Answer · edited Apr 13 '17 at 12:23

You appear to be running into a specific combination of hardware bug. It is already reported as LP Bug #783165 and I think it's caused by something odd in the EDID of your display that confuses the i915 driver. Make sure you mark yourself as affected in that bug report, subscribe to updates if you like and feel free to post a working workaround in the bug report. This could be useful for anyone else running into the same and hitting to the bug report rather than the Q&A here.

Workaround

There's this workaround I spotted on chrisnewland.com:

Use the xrandr command to get the detected modes
chriswhocodes@debian:~$ xrandr  Screen 0: minimum 320 x 200, current
1024 x 768, maximum 4096 x 4096  VGA-0 connected 1024x768+0+0 (normal
left inverted right x axis y axis) 0mm x 0mm    1360x768       59.8   
1024x768       60.0*    800x600        60.3     56.2      848x480     
60.0      640x480        59.9     59.9   
Note the name of the screen, here it is VGA-0 but yours may differ

Use the cvt command to get a Modeline string for the resolution you want (1280x1024)
chriswhocodes@debian:~$ cvt 1280 1024 
# 1280x1024 59.89 Hz (CVT 1.31M4) hsync: 63.67 kHz; pclk: 109.00 MHz  Modeline "1280x1024_60.00"  109.00  1280 1368 1496 1712  1024 1027
1034 1063 -hsync +vsync 
Now copy everything after the word Modeline into the xrandr --newmode command
chriswhocodes@debian:~$ xrandr --newmode "1280x1024_60.00"  109.00 
1280 1368 1496 1712  1024 1027 1034 1063 -hsync +vsync 
Now add the mode to your screen
chriswhocodes@debian:~$ xrandr --addmode VGA-0 1280x1024_60.00 
Now change to the new resolution
chriswhocodes@debian:~$ xrandr --output VGA-0 --mode 1280x1024_60.00 
You should now be running at 1280x1024 but you need the next step to make it permanent

From here the posted workaround seems to be out of date. See this answer on how to make it permanent.

Max resolution available is 1024x768, while I should expect 1280x1024

1 Answers1

Workaround