Red Hat Bugzilla – Bug 831221
No gdm login presented with external monitor connected
Last modified: 2013-08-01 06:14:18 EDT
Created attachment 591198 [details]
xsession-errors from the problem boot
Description of problem:
When booting Dell M6600 laptop with Dell P2312H external LCD attached, a login is not presented. The laptop screen shows the desktop background, the LCD is powered and has signal but is black, and no amount of trickery can log me in via the desktop.
I am able to select a virtual session and login to the OS, and observe the .xsession-errors as attached below.
If I boot the laptop without the monitor connected, the desktop provides the expected login screen. I can then connect the external monitor and proceed with my business.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Connect my external monitor to my laptop
2. Boot the laptop
3. login screen is not drawn, but background image is present
login dialog is not presented
login dialog would be presented to I could login and get to gnome-shell
[jmiller@box42 ~]$ sudo lspci
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
00:16.3 Serial controller: Intel Corporation 6 Series/C200 Series Chipset Family KT Controller (rev 04)
00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04)
00:1a.0 USB Controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b4)
00:1c.1 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 (rev b4)
00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b4)
00:1c.7 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 8 (rev b4)
00:1d.0 USB Controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation QM67 Express Chipset Family LPC Controller (rev 04)
00:1f.2 RAID bus controller: Intel Corporation Mobile 82801 SATA RAID Controller (rev 04)
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 04)
01:00.0 VGA compatible controller: ATI Technologies Inc Blackcomb [AMD Radeon HD 6900M Series]
01:00.1 Audio device: ATI Technologies Inc Barts HDMI Audio [Radeon HD 6800 Series]
03:00.0 Network controller: Intel Corporation Centrino Ultimate-N 6300 (rev 35)
04:00.0 USB Controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 04)
[jmiller@box42 ~]$ sudo lspci -v -s 01:00.0
01:00.0 VGA compatible controller: ATI Technologies Inc Blackcomb [AMD Radeon HD 6900M Series] (prog-if 00 [VGA controller])
Subsystem: Dell Device 04a4
Flags: bus master, fast devsel, latency 0, IRQ 51
Memory at d0000000 (64-bit, prefetchable) [size=256M]
Memory at e2420000 (64-bit, non-prefetchable) [size=128K]
I/O ports at 6000 [size=256]
Expansion ROM at e2400000 [disabled] [size=128K]
Capabilities:  Power Management version 3
Capabilities:  Express Legacy Endpoint, MSI 00
Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities:  Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
Capabilities:  Advanced Error Reporting
Kernel driver in use: radeon
I don't have another laptop to test this on, so I don't know if this is unique to this hardware combination or not.
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