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I am trying to get the resolution on an old laptop normal. The laptop is a HP G72-a10SB with a 1600x900 screen, however, I get a stretched-out lower resolution. The only 2 options in System settings > Displays are 1024 x 768 (4:3) (selected) and 800 x 600 (4:3). Here is some information:

From the HP website:

Video Graphics: ATI Mobility Radeon HD 5470 Graphics (switchable)

Video Memory: up to 2714 MB total graphics memory with 1 GB DDR3 dedicated

Display: 43.9 cm (17.3") diagonal HD+ High-Definition LED HP BrightView Display (1600 x 900)

xrandr output:

siyck@siyck-laptop:~$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 800 x 600, current 1024 x 768, maximum 1024 x 768
default connected 1024x768+0+0 0mm x 0mm
1024x768 61.0*

lspci output:

siyck@siyck-laptop:~$ lspci
00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 02)
00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev 02)
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics
Controller (rev 02)
00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI
Controller (rev 06)
00:1a.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced
Host Controller (rev 05)
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition
Audio (rev 05)
00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05)
00:1c.2 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 3 (rev 05)
00:1d.0 USB controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5)
00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05) 00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 05)
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Park [Mobility Radeon HD 5430/5450/5470]
01:00.1 Audio device: Advanced Micro Devices [AMD] nee ATI Cedar HDMI Audio [Radeon HD 5400/6300 Series]
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)
03:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01)
7f:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02)
7f:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02)
7f:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02)
7f:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02)
7f:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
7f:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02)

No fglrx installed:

siyck@siyck-laptop:~$ cd /usr/share/ati
bash: cd: /usr/share/ati: No such file or directory

Just making sure:

siyck@siyck-laptop:~$ dpkg -s xorg-driver-fglrx
dpkg-query: package 'xorg-driver-fglrx' is not installed and no information is available
Use dpkg --info (= dpkg-deb --info) to examine archive files,
and dpkg --contents (= dpkg-deb --contents) to list their contents.
siyck@siyck-laptop:~$ dpkg -s fglrx
dpkg-query: package 'fglrx' is not installed and no information is available
Use dpkg --info (= dpkg-deb --info) to examine archive files,
and dpkg --contents (= dpkg-deb --contents) to list their contents.

Not too sure what this means but I guess it's not installed:

siyck@siyck-laptop:~$ locate fglrx
/usr/share/app-install/desktop/fglrx-driver.desktop
/usr/share/apport/package-hooks/source_fglrx-installer-experimental-9.py
/usr/share/apport/package-hooks/source_fglrx-installer-updates.py
/usr/share/apport/package-hooks/source_fglrx-installer.py

Can't add a new mode to xrandr:

siyck@siyck-laptop:~$ cvt 1600 900
# 1600x900 59.95 Hz (CVT 1.44M9) hsync: 55.99 kHz; pclk: 118.25 MHz
Modeline "1600x900_60.00" 118.25 1600 1696 1856 2112 900 903 908 934 -hsync +vsync
siyck@siyck-laptop:~$ xrandr --newmode "1600x900_60.00" 118.25 1600 1696 1856 2112 900 903 908 934 -hsync +vsync
xrandr: Failed to get size of gamma for output default
X Error of failed request: BadName (named color or font does not exist)
Major opcode of failed request: 140 (RANDR)
Minor opcode of failed request: 16 (RRCreateMode)
Serial number of failed request: 19
Current serial number in output stream: 19

I'm using GNOME3

siyck@siyck-laptop:~$ gnome-shell --version
GNOME Shell 3.6.3.1

Also, the laptop does not detect screens I connect to its VGA port.

Some help or pointers?

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It's simple.. Your system lacks the graphics driver.. So you need to install graphics driver.. It seems that you have Hybrid Intel/AMD graphics driver so This Post may help you to install your drivers.. –  Saur.K Sep 11 '13 at 17:17
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1 Answer

I don't know if you want to use the open source or the proprietary drivers.

I use the open source drivers, and I had the same problem. In my case the solution was to remove the option nomodeset from the kernel boot parameters. To do this I edited

/etc/default/grub

And I commented out the line

#GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"

and I replaced it by

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash "

After editing that file you have to run update-grub so that the kernel boot entries are regenerated.

It takes some seconds before it boots (you can see this if you also remove the quiet option above.

Hope that helps.

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