Géza Búza, given your card is "Mobility Radeon HD 3650", the last release offering compatible and supported fglrx drivers is Precise. If you use fglrx via https://launchpad.net/ubuntu/+source/fglrx-installer does this WORKAROUND the problem?
** Summary changed: - External monitor on display port has no sync with radeon driver + 1002:9591 [Lenovo ThinkPad T500] External monitor on display port has no sync with radeon driver -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/952486 Title: 1002:9591 [Lenovo ThinkPad T500] External monitor on display port has no sync with radeon driver Status in The Linux Kernel: Confirmed Status in “linux” package in Ubuntu: Incomplete Bug description: When I turn on the external monitor, it displays an error message: "The current input timing is not supported by the monitor display. Please change your input timing to 1920x1080@60Hz or any other monitor listed timing as per the monitor specifications." The GNOME display settings dialog shows exacty this recommended setting as current. I even tried to set it up using xrand with: $ xrandr --output DisplayPort-0 --auto -s 24/1920x1080 -r 60 $ xrandr -q Screen 0: minimum 320 x 200, current 3200 x 1080, maximum 8192 x 8192 DVI-0 unknown connection (normal left inverted right x axis y axis) 1360x768 59.8 1152x864 60.0 1024x768 60.0 800x600 60.3 640x480 59.9 680x384 119.6 119.9 576x432 120.1 512x384 120.0 400x300 120.6 320x240 120.1 LVDS connected 1280x800+0+0 (normal left inverted right x axis y axis) 331mm x 207mm 1280x800 60.0*+ 50.1 1280x720 59.9 1152x768 59.8 1024x768 59.9 800x600 59.9 848x480 59.7 720x480 59.7 640x480 59.4 DisplayPort-0 connected 1920x1080+1280+0 (normal left inverted right x axis y axis) 509mm x 286mm 1920x1080 60.0*+ 1280x1024 75.0 60.0 1152x864 75.0 1024x768 75.1 60.0 800x600 75.0 60.3 640x480 75.0 60.0 720x400 70.1 VGA-0 disconnected (normal left inverted right x axis y axis) External monitor is a Dell U2311H unit. I have found a similar bug like this: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/838181 ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-18-generic 3.2.0-18.29 ProcVersionSignature: Ubuntu 3.2.0-18.29-generic 3.2.9 Uname: Linux 3.2.0-18-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. AplayDevices: **** List of PLAYBACK Hardware Devices **** card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 ApportVersion: 1.94.1-0ubuntu2 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: geza 2080 F.... pulseaudio CRDA: country HU: (2402 - 2482 @ 40), (N/A, 20) (5170 - 5250 @ 40), (N/A, 20) (5250 - 5330 @ 40), (N/A, 20), DFS (5490 - 5710 @ 40), (N/A, 27), DFS Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xfc220000 irq 50' Mixer name : 'Conexant CX20561 (Hermosa)' Components : 'HDA:14f15051,17aa2100,00100000 HDA:14f12c06,17aa2122,00100000' Controls : 17 Simple ctrls : 12 Card29.Amixer.info: Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 7VHT16WW-1.06' Mixer name : 'ThinkPad EC 7VHT16WW-1.06' Components : '' Controls : 1 Simple ctrls : 1 Card29.Amixer.values: Simple mixer control 'Console',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] Date: Sun Mar 11 20:15:41 2012 EcryptfsInUse: Yes InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301) MachineType: LENOVO 2081CTO PccardctlIdent: Socket 0: no product info available PccardctlStatus: Socket 0: no card ProcEnviron: TERM=xterm LANG=hu_HU.UTF-8 SHELL=/bin/bash ProcFB: 0 radeondrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-18-generic root=UUID=540742bc-9ee9-4c77-8e80-91f88cc9f368 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.2.0-18-generic N/A linux-backports-modules-3.2.0-18-generic N/A linux-firmware 1.71 SourcePackage: linux StagingDrivers: mei UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/14/2011 dmi.bios.vendor: LENOVO dmi.bios.version: 6FET92WW (3.22 ) dmi.board.name: 2081CTO dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr6FET92WW(3.22):bd12/14/2011:svnLENOVO:pn2081CTO:pvrThinkPadT500:rvnLENOVO:rn2081CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 2081CTO dmi.product.version: ThinkPad T500 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/952486/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp