Thank you for the reply! > Does your Arch use systemd? > Is your *buntu not using systemd? Yes to both.
I am aware of the on-demand "feature" and did what you proposed (had already done the same for half of the terminals). After testing I noticed something more specific. Suppose the following tty2,3 or VT: 1. Ctrl+Alt+F2: logged in user in console (no X) 2. Ctrl+Alt+F3: logged in user in console (no X) 3. Ctrl+Alt+F4: logged in user in Desktop Environment (X) 4. Ctrl+Alt+F5: logged in user in Desktop Environment (X) >From 1 to 2, or 2 to 1 there is no delay. >From 1,2 to 3, or 1,2 to 4 there is **no** delay. >From 3,4 to 1,2 there **is** delay. >From 3 to 4, or 4 to 3, there **is**delay. Do you think I should post to systemd for this? constantine On Thu, Oct 9, 2014 at 12:38 AM, constantine <costas.magn...@gmail.com> wrote: > Hello all! > > I am encountering a peculiar problem with Fast User Switching or Kernel > Mode Setting and I do not know how to troubleshoot it. > > When I run two (or more) Virtual Terminals switching between them > (Ctrl+Alt+F2-3, etc.) takes 2+ seconds. (That is either simply initiated > with startx from tty2 and tty3 or as different displays with KDisplay > Manager (kdm) in :0 and :1) > > I am using an intel graphics driver so I suppose KMS should be enabled by > default and this seems to be the case, but there still are delays swithing > VTs. > > I have followed the instructions at > http://carlosbecker.com/posts/how-to-enable-kms-on-i915-graphiccard-archlinux/ > https://wiki.archlinux.org/index.php/kernel_mode_setting > https://wiki.archlinux.org/index.php/Intel_graphics but I am still > experiencing the problem. > > Last, I am certain it is not a hardware related issue, because I can fast > switch in ubuntu, but not in Arch linux. > > > > Any ideas? > > > > > $ sudo cat /sys/module/i915/parameters/modeset > 1 > > ### Note: ### Before starting the "process" of enabling KMS (which I > suppose it should be enabled in the first place, right?) this value was: > -1 > > $ uname -a > Linux myhostname 3.16.4-1-ARCH #1 SMP PREEMPT Mon Oct 6 08:22:27 CEST > 2014 x86_64 GNU/Linux > > $ lsmod | grep -e drm -e 915 -e kms > crc32_pclmul 12915 0 > scsi_mod 142915 4 uas,usb_storage,libata,sd_mod > i915 864879 8 > button 12909 1 i915 > i2c_algo_bit 12744 1 i915 > video 17995 1 i915 > drm_kms_helper 49262 1 i915 > drm 258005 10 i915,drm_kms_helper > i2c_core 50152 5 drm,i915,i2c_i801,drm_kms_helper, > i2c_algo_bit > intel_gtt 17848 2 i915,intel_agp > > $ sudo lspci -vvnn | head -28 | tail -21 > 00:02.0 VGA compatible controller [0300]: Intel Corporation Xeon E3-1200 > v2/3rd Gen Core processor Graphics Controller [8086:0152] (rev 09) (prog-if > 00 [VGA controller]) > Subsystem: ASRock Incorporation Device [1849:0152] > 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 40 > Region 0: Memory at f7800000 (64-bit, non-prefetchable) [size=4M] > Region 2: Memory at e0000000 (64-bit, prefetchable) [size=256M] > Region 4: I/O ports at f000 [size=64] > Expansion ROM at <unassigned> [disabled] > Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- > Address: fee0f00c Data: 4181 > 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- > Kernel driver in use: i915 > Kernel modules: i915 > > $ head -10 /var/log/Xorg.0.log > [ 4.919] > X.Org X Server 1.16.1 > Release Date: 2014-09-21 > [ 4.919] X Protocol Version 11, Revision 0 > [ 4.919] Build Operating System: Linux 3.16.1-1-ARCH x86_64 > [ 4.919] Current Operating System: Linux myhostname 3.16.4-1-ARCH #1 > SMP PREEMPT Mon Oct 6 08:22:27 CEST 2014 x86_64 > [ 4.919] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-linux > root=UUID=af9a90ee-5db2-4abf-b8be-006a65e9f09e rw quiet video=SVIDEO-1:d > [ 4.920] Build Date: 21 September 2014 10:53:13AM > [ 4.920] > [ 4.920] Current version of pixman: 0.32.6 > > ### Note: ### As kernel parameters I have also tried video=SVIDEO-1: > d, i915.modeset=1, and nothing, but neither works. > >
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