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After a recent update, I can no longer set my multiple screens to work as they should.

I received the error: virtual size does not fit available size.

This problem appeared in 11.04, but the solutions do not work now. I am running 12.04 LTS Ubuntu. How can I fix it?

My system information:

Linux ------------------ 3.2.0-75-generic #110-Ubuntu SMP Tue Dec 16 19:11:55 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

cat /etc/*-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=12.04 DISTRIB_CODENAME=precise DISTRIB_DESCRIPTION="Ubuntu 12.04.5 LTS" NAME="Ubuntu" VERSION="12.04.5 LTS, Precise Pangolin" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Ubuntu precise (12.04.5 LTS)" VERSION_ID="12.04"

sudo lshw -c video *-display UNCLAIMED description: VGA compatible controller product: Cedar [Radeon HD 5000/6000/7350/8350 Series] vendor: Hynix Semiconductor (Hyundai Electronics) physical id: 0 bus info: pci@0000:01:00.0 version: 00 width: 64 bits clock: 33MHz capabilities: pm pciexpress msi vga_controller bus_master cap_list configuration: latency=0 resources: memory:d0000000-dfffffff memory:e1420000-e143ffff ioport:3000(size=256) memory:e1400000-e141ffff

lspci -vv 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cedar [Radeon HD 5000/6000/7350/8350 Series] (prog-if 00 [VGA controller]) Subsystem: Dell Radeon HD 6350 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- SERR- #

lshw 75: None 00.0: 10000 Monitor [Created at fb.71] Unique ID: rdCR.EY_qmtb9YY0 Hardware Class: monitor Model: "Generic Monitor" Vendor: "Generic"

  • Welcome to AskUbuntu! ;-) Could you please give us a bit more information like: What GPU you have? what version of driver you're running? Please edit your question and add this information... – Fabby Jan 30 '15 at 18:13

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