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Hello, A customer have reported issue with Xorg based vnc showing blank screen. I am able to reproduce the problem locally. I see blank screen while connecting to Xorg based vnc configured on rhel6 using tigervnc server module.. Problem looks specific to radeon and that too one particular ES1000 hardware... e.g. In my testing I observed Radeon ES1000 VGA with Subsystem: 103c:31fb has problem but no problem with ES1000 VGA having Subsystem: 1028:01b3 Problem hardware: 01:03.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] ES1000 (rev 02) 01:03.0 0300: 1002:515e (rev 02) (prog-if 00 [VGA controller]) Subsystem: 103c:31fb Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping+ SERR+ FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 64 (2000ns min), Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 16 Region 0: Memory at f0000000 (32-bit, prefetchable) [size=128M] Region 1: I/O ports at 2000 [size=256] Region 2: Memory at fd7f0000 (32-bit, non-prefetchable) [size=64K] [virtual] Expansion ROM at fd700000 [disabled] [size=128K] Capabilities: [50] 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- Kernel driver in use: radeon Kernel modules: radeon, radeonfb No Problem hardware: 10:0d.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] ES1000 (rev 02) 10:0d.0 0300: 1002:515e (rev 02) (prog-if 00 [VGA controller]) Subsystem: 1028:01b3 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop+ ParErr- Stepping+ SERR+ FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 32 (2000ns min), Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 19 Region 0: Memory at d0000000 (32-bit, prefetchable) [size=128M] Region 1: I/O ports at dc00 [size=256] Region 2: Memory at fc2d0000 (32-bit, non-prefetchable) [size=64K] [virtual] Expansion ROM at fc100000 [disabled] [size=128K] Capabilities: [50] 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- Kernel driver in use: radeon Kernel modules: radeon, radeonfb I see display on vncviewer screen after around 6 to 7 minutes. Then if I click on a listed user for login, password prompt is also displayed after delay of few minutes. Problem can be workaround by disabling acceleration using --> Option "NoAccel" "true" <-- in xorg.conf Drawing screen contents over vnc takes huge delay when acceleration is enabled? Customer would like the driver to work out of the box without needing to disable acceleration in configuration file. Regards, Ashish
Created attachment 992192 [details] Xorg log Hi, I was able to reproduce the "blank screen" issue when connecting to a VNC server using an Xorg module. The component versions I was able to reproduce on were: xorg-x11-drv-ati-7.3.99-2.el6.x86_64 xorg-x11-server-Xorg-1.15.0-31.el6.x86_64 tigervnc-server-module-1.1.0-16.el6.x86_64 Attaching Xorg log.
(In reply to Milan Barta from comment #11) > Created attachment 992192 [details] > Xorg log > > Hi, > > I was able to reproduce the "blank screen" issue when connecting to a VNC > server using an Xorg module. > > The component versions I was able to reproduce on were: > xorg-x11-drv-ati-7.3.99-2.el6.x86_64 > xorg-x11-server-Xorg-1.15.0-31.el6.x86_64 > tigervnc-server-module-1.1.0-16.el6.x86_64 > > Attaching Xorg log. Milane could you please VERIFY with the fixed package? Thanks Tom
Hi, confirming the bug is fixed with the latest packages xorg-x11-drv-ati-7.5.99-3.el6.x86_64 xorg-x11-server-Xorg-1.15.0-33.el6.x86_64 Switching to VERIFIED.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2015-1301.html