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I have suffered a change in my screen resolution. I’ve just installed Ubuntu 17.04 (previously Windows), and my screen resolution decreased, and now only allow to select 1024x768 or 800x600 (see capture); I presume it may be a driver problem.

$ lspci
    ...
00:1f.5 IDE interface: Intel Corporation 82801JI (ICH10 Family) 2 port SATA IDE Controller #2
[01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. \[AMD/ATI\] RV620 LE \[Radeon HD 3450\][1]
01:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] RV620 HDMI Audio [Radeon HD 3450/3470/3550/3570]
03:00.0 FireWire (IEEE 1394): JMicron Technology Corp. IEEE 1394 Host Controller
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 02)
05:00.0 Network controller: Broadcom Limited BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller (rev 02)

I would appreciate any suggestions on how to increase my screen resolution to previous levels.

Screenshot

  • Did you install the video driver for the AMD/ATI? – heynnema Jun 9 '17 at 19:11
  • I've just installed Ubuntu 17.04, my screen run well during a couple of weeks but it changed to a lower resolution (I cannot imagine why). Reinstalled a completely fresh Ubuntu, but the problem persists. – Jordi Jun 10 '17 at 7:21
  • See help.ubuntu.com/community/RadeonDriver – heynnema Jun 10 '17 at 12:48
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You can use xrandr to add custom resolution to the problem. Typing $ xrandr on terminal will provide you some details about your current display.
$ cvt 1024 768 if you want to add a resolution configuration for 1024x768. which will give you an output something like this.

# 1024×768 59.92 Hz (CVT 0.79M3) hsync: 47.82 kHz; pclk: 63.50 MHz
Modeline "1024x768_60.00" 63.50 1024 1072 1176 1328 768 771 775 798 -hsync +vsync

Now create a new modeline

$ xrandr --newmode <Modeline>

Copy the modeline of the previous output to the place mode line

$ xrandr --newmode "1024x768_60.00"   63.50  1024 1072 1176 1328  768 771 775 798 -hsync +vsync

Now you need to add the above mode using the following command

$ xrandr --addmode VGA1 1024x768_60.00

here for VGA1 you have to use what ever that was there for $ xrandr output

$ xrandr --output VGA1 --mode 1024x768_60.00

Now your resolution should be fixed but this will just long last for your current session. To make it work every time you login you need to create a bash file for it and then add it to startup app list.

Tell me if you need more help.

| improve this answer | |
  • @Jordi did you try it? – Ashvin Sharma Jun 11 '17 at 7:07
  • Hi Ashvin, as you say it's only a workaround...but it works! Thank you for your answer. – Jordi Jun 11 '17 at 19:14
  • You can initiate it on startup if anything doesn't work and you want to make thing permanent. – Ashvin Sharma Jun 12 '17 at 5:11

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