New xrandr mode in FC22

asked 2015-07-02 07:24:55 -0500

john_erlandsson gravatar image

updated 2015-07-22 07:17:43 -0500


Just switched to FC22. Having problems with the VGA port on my laptop docking station. If I connect the monitor directly to the VGA port on my laptop the monitor is recognized and resolution is set to 1920x1080. But if I use my docking station the monitor is unknown and I had to set the resolution manually using xrandr.

This worked for FC 21 & 22

xrandr --newmode "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
xrandr --addmode VGA1 "1920x1080_60.00"

After that I was able to select 1920x1080 from display settings.

In FC22 the new mode shows up in the display settings combo box, but when I select it the display goes blank for a second and then the mode is changed back to the previous setting.

Output of #sudo lspci -s 00:02.0 -vvv -H1

00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) (prog-if 00 [VGA controller])
    Subsystem: Hewlett-Packard Company Device 17ab
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
    Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
    Latency: 0
    Interrupt: pin A routed to IRQ 10
    Region 0: Memory at d4000000 (64-bit, non-prefetchable)
    Region 2: Memory at c0000000 (64-bit, prefetchable)
    Region 4: I/O ports at 4000
    Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
        Address: fee0f00c  Data: 4172
    Capabilities: [d0] Power Management version 2
        Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
        Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
    Capabilities: [a4] PCI Advanced Features
        AFCap: TP+ FLR+
        AFCtrl: FLR-
        AFStatus: TP-

The monitor is a HP Compaq LA2306x with a native resolution of 1920x1080. Changing monitor does not help.

What is the recommended way of setting screen resolution these days?

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