I'm experiencing a really weird issue when activating my second graphics card (ATI HD4350) using " xrandr --setprovideroutputsource 1 0 ". I need this because of a triple screen setup.
My primary GFX card is a ATI HD3870
System: Debian 9 "Stretch" (i686-32 bit PAE) with XFCE-desktop environment.
The desktop environment is working fine, but when I return from a locked screen, suspend to RAM, or the "real" TTY-Shells XFCE crashes and shows the login screen. So my session is gone.
If I try to suspend or lock the screen without the enabled second graphics card all is working as intended.
The syslog shows me following:
Oct 28 19:12:17 <myhost> org.a11y.atspi.Registry[1087]: XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0"
Oct 28 19:12:17 <myhost> org.a11y.atspi.Registry[1087]: after 63 requests (63 known processed) with 0 events remaining.
Oct 28 19:12:17 <myhost> org.a11y.atspi.Registry[795]: XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0"
Oct 28 19:12:17 <myhost> org.a11y.atspi.Registry[795]: after 79 requests (79 known processed) with 0 events remaining.
Oct 28 19:12:17 <myhost> systemd[1023]: xfce4-notifyd.service: Main process exited, code=exited, status=1/FAILURE
Oct 28 19:12:17 <myhost> systemd[1023]: xfce4-notifyd.service: Unit entered failed state.
Oct 28 19:12:17 <myhost> systemd[1023]: xfce4-notifyd.service: Failed with result 'exit-code'.
Oct 28 19:12:17 <myhost> systemd[1]: Stopping User Manager for UID 111...
lspci:
00:00.0 Host bridge: Intel Corporation 4 Series Chipset DRAM Controller (rev 02)
00:01.0 PCI bridge: Intel Corporation 4 Series Chipset PCI Express Root Port (rev 02)
00:1a.0 USB controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #4
00:1a.1 USB controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #5
00:1a.2 USB controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #6
00:1a.7 USB controller: Intel Corporation 82801JI (ICH10 Family) USB2 EHCI Controller #2
00:1b.0 Audio device: Intel Corporation 82801JI (ICH10 Family) HD Audio Controller
00:1c.0 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI Express Root Port 1
00:1c.5 PCI bridge: Intel Corporation 82801JI (ICH10 Family) PCI Express Root Port 6
00:1d.0 USB controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #1
00:1d.1 USB controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #2
00:1d.2 USB controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI Controller #3
00:1d.7 USB controller: Intel Corporation 82801JI (ICH10 Family) USB2 EHCI Controller #1
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 90)
00:1f.0 ISA bridge: Intel Corporation 82801JIB (ICH10) LPC Interface Controller
00:1f.2 SATA controller: Intel Corporation 82801JI (ICH10 Family) SATA AHCI Controller
00:1f.3 SMBus: Intel Corporation 82801JI (ICH10 Family) SMBus Controller
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV670 [Radeon HD 3870]
01:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] RV670/680 HDMI Audio [Radeon HD 3690/3800 Series]
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV710 [Radeon HD 4350/4550]
02:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] RV710/730 HDMI Audio [Radeon HD 4000 series]
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 02)
04:02.0 Multimedia controller: Philips Semiconductors SAA7134/SAA7135HL Video Broadcast Decoder (rev 01)
04:05.0 IDE interface: Integrated Technology Express, Inc. IT8213 IDE Controller
04:07.0 FireWire (IEEE 1394): Texas Instruments TSB43AB23 IEEE-1394a-2000 Controller (PHY/Link)
If you need some more informations, ask
.Thanks in advance!