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Salve a tutti,
ho un problema nella risoluzione del monitor. Dopo un corposo aggiornamento di questa mattina, al riavvio ho trovato una risoluzione di 1024x768. Ho provato a modificare questi parametri nelle impostazioni ma mi fa scegliere solo tra questo e una ancora peggiore 800x600.

Come posso risolvere?
Ho letto da qualche parte che probabilmente c'è bisogno di modificare il file xorg.conf, ma essendo tutt'altro che esperto non saprei come metterci mano. Qualcuno mi aiuta?

Ho ubuntu 12.04, e per avere una panoramica dell'hardware vi rimando a lshw

Codice: Seleziona tutto

baol@baol-desktop:~$ sudo lshw
[sudo] password for baol: 
baol-desktop              
    description: Desktop Computer
    product: System Product Name (To Be Filled By O.E.M.)
    vendor: System manufacturer
    version: System Version
    serial: System Serial Number
    width: 64 bits
    capabilities: smbios-2.5 dmi-2.5 vsyscall32
    configuration: boot=normal chassis=desktop family=To Be Filled By O.E.M. sku=To Be Filled By O.E.M. uuid=E0926C71-8DFE-D511-94D3-5404A6962F80
  *-core
       description: Motherboard
       product: P5G41T-M LX
       vendor: ASUSTeK Computer INC.
       physical id: 0
       version: Rev X.0x
       serial: MT701A035231777
       slot: To Be Filled By O.E.M.
     *-firmware
          description: BIOS
          vendor: American Megatrends Inc.
          physical id: 0
          version: 0902
          date: 07/27/2011
          size: 64KiB
          capacity: 960KiB
          capabilities: isa pci pnp apm upgrade shadowing escd cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int9keyboard int14serial int17printer int10video acpi usb ls120boot zipboot biosbootspecification
     *-cpu
          description: CPU
          product: Pentium(R) Dual-Core  CPU      E5700  @ 3.00GHz
          vendor: Intel Corp.
          physical id: 4
          bus info: cpu@0
          version: Pentium(R) Dual-Core CPU E5700 @ 3.00GHz
          serial: To Be Filled By O.E.M.
          slot: LGA775
          size: 1203MHz
          capacity: 3800MHz
          width: 64 bits
          clock: 200MHz
          capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm xsave lahf_lm tpr_shadow vnmi flexpriority cpufreq
          configuration: cores=2 enabledcores=2 threads=2
        *-cache:0
             description: L1 cache
             physical id: 5
             slot: L1-Cache
             size: 64KiB
             capacity: 64KiB
             capabilities: internal write-back data
        *-cache:1
             description: L2 cache
             physical id: 6
             slot: L2-Cache
             size: 2MiB
             capacity: 2MiB
             capabilities: internal write-back unified
     *-memory
          description: System Memory
          physical id: 27
          slot: System board or motherboard
          size: 8GiB
        *-bank:0
             description: DIMM Synchronous 800 MHz (1,2 ns)
             product: PartNum0
             vendor: Manufacturer0
             physical id: 0
             serial: SerNum0
             slot: DIMM A1
             size: 4GiB
             width: 64 bits
             clock: 800MHz (1.2ns)
        *-bank:1
             description: DIMM Synchronous 800 MHz (1,2 ns)
             product: PartNum1
             vendor: Manufacturer1
             physical id: 1
             serial: SerNum1
             slot: DIMM B1
             size: 4GiB
             width: 64 bits
             clock: 800MHz (1.2ns)
     *-pci
          description: Host bridge
          product: 4 Series Chipset DRAM Controller
          vendor: Intel Corporation
          physical id: 100
          bus info: pci@0000:00:00.0
          version: 03
          width: 32 bits
          clock: 33MHz
        *-pci:0
             description: PCI bridge
             product: 4 Series Chipset PCI Express Root Port
             vendor: Intel Corporation
             physical id: 1
             bus info: pci@0000:00:01.0
             version: 03
             width: 32 bits
             clock: 33MHz
             capabilities: pci pm msi pciexpress normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:40 ioport:d000(size=4096) memory:fe900000-fe9fffff ioport:e0000000(size=268435456)
           *-display
                description: VGA compatible controller
                product: Cedar PRO [Radeon HD 5450]
                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 rom
                configuration: driver=radeon latency=0
                resources: irq:43 memory:e0000000-efffffff memory:fe9c0000-fe9dffff ioport:d000(size=256) memory:fe9a0000-fe9bffff
           *-multimedia
                description: Audio device
                product: Cedar HDMI Audio [Radeon HD 5400/6300 Series]
                vendor: Hynix Semiconductor (Hyundai Electronics)
                physical id: 0.1
                bus info: pci@0000:01:00.1
                version: 00
                width: 64 bits
                clock: 33MHz
                capabilities: pm pciexpress msi bus_master cap_list
                configuration: driver=snd_hda_intel latency=0
                resources: irq:45 memory:fe9fc000-fe9fffff
        *-multimedia
             description: Audio device
             product: N10/ICH 7 Family High Definition Audio Controller
             vendor: Intel Corporation
             physical id: 1b
             bus info: pci@0000:00:1b.0
             version: 01
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi pciexpress bus_master cap_list
             configuration: driver=snd_hda_intel latency=0
             resources: irq:44 memory:fe8fc000-fe8fffff
        *-pci:1
             description: PCI bridge
             product: N10/ICH 7 Family PCI Express Port 1
             vendor: Intel Corporation
             physical id: 1c
             bus info: pci@0000:00:1c.0
             version: 01
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:41 ioport:1000(size=4096) memory:f4200000-f43fffff ioport:f4400000(size=2097152)
        *-pci:2
             description: PCI bridge
             product: N10/ICH 7 Family PCI Express Port 2
             vendor: Intel Corporation
             physical id: 1c.1
             bus info: pci@0000:00:1c.1
             version: 01
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:42 ioport:e000(size=4096) memory:fea00000-feafffff ioport:f4000000(size=2097152)
           *-network
                description: Ethernet interface
                product: AR8131 Gigabit Ethernet
                vendor: Atheros Communications Inc.
                physical id: 0
                bus info: pci@0000:02:00.0
                logical name: eth0
                version: c0
                serial: 54:04:a6:96:2f:80
                capacity: 1Gbit/s
                width: 64 bits
                clock: 33MHz
                capabilities: pm msi pciexpress vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
                configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=1.0.1.0-NAPI firmware=N/A latency=0 link=no multicast=yes port=twisted pair
                resources: irq:46 memory:feac0000-feafffff ioport:ec00(size=128)
        *-usb:0
             description: USB controller
             product: N10/ICH 7 Family USB UHCI Controller #1
             vendor: Intel Corporation
             physical id: 1d
             bus info: pci@0000:00:1d.0
             version: 01
             width: 32 bits
             clock: 33MHz
             capabilities: uhci bus_master
             configuration: driver=uhci_hcd latency=0
             resources: irq:23 ioport:c480(size=32)
        *-usb:1
             description: USB controller
             product: N10/ICH 7 Family USB UHCI Controller #2
             vendor: Intel Corporation
             physical id: 1d.1
             bus info: pci@0000:00:1d.1
             version: 01
             width: 32 bits
             clock: 33MHz
             capabilities: uhci bus_master
             configuration: driver=uhci_hcd latency=0
             resources: irq:19 ioport:c800(size=32)
        *-usb:2
             description: USB controller
             product: N10/ICH 7 Family USB UHCI Controller #3
             vendor: Intel Corporation
             physical id: 1d.2
             bus info: pci@0000:00:1d.2
             version: 01
             width: 32 bits
             clock: 33MHz
             capabilities: uhci bus_master
             configuration: driver=uhci_hcd latency=0
             resources: irq:18 ioport:c880(size=32)
        *-usb:3
             description: USB controller
             product: N10/ICH 7 Family USB UHCI Controller #4
             vendor: Intel Corporation
             physical id: 1d.3
             bus info: pci@0000:00:1d.3
             version: 01
             width: 32 bits
             clock: 33MHz
             capabilities: uhci bus_master
             configuration: driver=uhci_hcd latency=0
             resources: irq:16 ioport:cc00(size=32)
        *-usb:4
             description: USB controller
             product: N10/ICH 7 Family USB2 EHCI Controller
             vendor: Intel Corporation
             physical id: 1d.7
             bus info: pci@0000:00:1d.7
             version: 01
             width: 32 bits
             clock: 33MHz
             capabilities: pm debug ehci bus_master cap_list
             configuration: driver=ehci_hcd latency=0
             resources: irq:23 memory:fe8fbc00-fe8fbfff
        *-pci:3
             description: PCI bridge
             product: 82801 PCI Bridge
             vendor: Intel Corporation
             physical id: 1e
             bus info: pci@0000:00:1e.0
             version: e1
             width: 32 bits
             clock: 33MHz
             capabilities: pci subtractive_decode bus_master cap_list
             resources: memory:feb00000-febfffff
           *-firewire
                description: FireWire (IEEE 1394)
                product: FW322/323
                vendor: LSI Corporation
                physical id: 1
                bus info: pci@0000:04:01.0
                version: 61
                width: 32 bits
                clock: 33MHz
                capabilities: pm ohci bus_master cap_list
                configuration: driver=firewire_ohci latency=64 maxlatency=24 mingnt=12
                resources: irq:16 memory:febff000-febfffff
        *-isa
             description: ISA bridge
             product: 82801GB/GR (ICH7 Family) LPC Interface Bridge
             vendor: Intel Corporation
             physical id: 1f
             bus info: pci@0000:00:1f.0
             version: 01
             width: 32 bits
             clock: 33MHz
             capabilities: isa bus_master cap_list
             configuration: latency=0
        *-ide:0
             description: IDE interface
             product: 82801G (ICH7 Family) IDE Controller
             vendor: Intel Corporation
             physical id: 1f.1
             bus info: pci@0000:00:1f.1
             version: 01
             width: 32 bits
             clock: 33MHz
             capabilities: ide bus_master
             configuration: driver=ata_piix latency=0
             resources: irq:18 ioport:1f0(size=8) ioport:3f6 ioport:170(size=8) ioport:376 ioport:ffa0(size=16)
        *-ide:1
             description: IDE interface
             product: N10/ICH7 Family SATA Controller [IDE mode]
             vendor: Intel Corporation
             physical id: 1f.2
             bus info: pci@0000:00:1f.2
             logical name: scsi2
             version: 01
             width: 32 bits
             clock: 66MHz
             capabilities: ide pm bus_master cap_list emulated
             configuration: driver=ata_piix latency=0
             resources: irq:22 ioport:c400(size=8) ioport:c080(size=4) ioport:c000(size=8) ioport:bc00(size=4) ioport:b880(size=16)
           *-disk
                description: ATA Disk
                product: MAXTOR STM316081
                vendor: Maxtor
                physical id: 0.0.0
                bus info: scsi@2:0.0.0
                logical name: /dev/sda
                version: 3.AA
                serial: 6PT4XZBV
                size: 149GiB (160GB)
                capabilities: partitioned partitioned:dos
                configuration: ansiversion=5 signature=00062831
              *-volume:0
                   description: Windows NTFS volume
                   physical id: 1
                   bus info: scsi@2:0.0.0,1
                   logical name: /dev/sda1
                   version: 3.1
                   serial: 58ef-7fef
                   size: 98MiB
                   capacity: 100MiB
                   capabilities: primary bootable ntfs initialized
                   configuration: clustersize=4096 created=2012-03-02 11:12:12 filesystem=ntfs label=Riservato per il sistema state=clean
              *-volume:1
                   description: Windows NTFS volume
                   physical id: 2
                   bus info: scsi@2:0.0.0,2
                   logical name: /dev/sda2
                   version: 3.1
                   serial: 68991662-c8b1-e145-af14-97c96fb6624a
                   size: 46GiB
                   capacity: 46GiB
                   capabilities: primary ntfs initialized
                   configuration: clustersize=4096 created=2012-03-02 11:12:17 filesystem=ntfs modified_by_chkdsk=true mounted_on_nt4=true resize_log_file=true state=dirty upgrade_on_mount=true
              *-volume:2
                   description: Extended partition
                   physical id: 3
                   bus info: scsi@2:0.0.0,3
                   logical name: /dev/sda3
                   size: 102GiB
                   capacity: 102GiB
                   capabilities: primary extended partitioned partitioned:extended
                 *-logicalvolume:0
                      description: Linux filesystem partition
                      physical id: 5
                      logical name: /dev/sda5
                      logical name: /
                      capacity: 94GiB
                      configuration: mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro,user_xattr,acl,barrier=1,data=ordered state=mounted
                 *-logicalvolume:1
                      description: Linux swap / Solaris partition
                      physical id: 6
                      logical name: /dev/sda6
                      capacity: 8190MiB
                      capabilities: nofs
           *-cdrom
                description: DVD-RAM writer
                product: DVDRAM GH22NS70
                vendor: HL-DT-ST
                physical id: 0.1.0
                bus info: scsi@2:0.1.0
                logical name: /dev/cdrom
                logical name: /dev/cdrw
                logical name: /dev/dvd
                logical name: /dev/dvdrw
                logical name: /dev/sr0
                version: EX00
                capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
                configuration: ansiversion=5 status=nodisc
  *-network
       description: Wireless interface
       physical id: 1
       bus info: usb@3:1
       logical name: wlan0
       serial: 00:08:10:75:51:eb
       capabilities: ethernet physical wireless
       configuration: broadcast=yes driver=rt2800usb driverversion=3.2.0-24-generic firmware=0.29 ip=192.168.1.217 link=yes multicast=yes wireless=IEEE 802.11bgn

Grazie a tutti per il tentativo!

Come non detto, ho risolto da solo.
Non so perchè, ma dopo l'aggiornamento si era abilitata l'opzione "Duplicare i monitor". Disabilitando quella opzione ho potuto ripristinare la risoluzione desiderata.

Se l'ultimo aggiornamento della 12.04 dovesse fare questo scherzetto a qualcun altro, spero che possa essergli utile questa discussione.

Forum Ubuntu-it

[Risolto] Risoluzione monitor ubuntu 12.04

[Risolto] Risoluzione monitor ubuntu 12.04

Re: Risoluzione monitor ubuntu 12.04