Black screen after unlocking PC that was previously Remote Desktop-ped to

I'm running Windows Server 2008 R2 Standard, Service Pack 1.
Often I need to work from home, in which case I jump onto a VPN via Citrix client and remote desktop to my work PC. Subsequently, when I come to work in the morning and attempt to unlock my PC, from time to time after entering my login credentials and pressing
'Enter' I get presented with two blank/black screens instead of my desktop. I tried being patient, moving my mouse a bit etc but to no avail. I notice that the keyboard is still functional (CAPS LOCK light goes on/off), and there appears to be some hard drive
activity. However I end up needing to reboot the PC (and lose whatever unsaved work I had).
I've done some googling, attempted most of the suggested solutions (involving changing some registry settings, updating video card drivers etc) but to no avail.
My video card is NVIDIA Quadro NVS 295, driver date 24/01/2014. I do have dual monitors configured (lenovo).
Any tips/suggestions would be much appreciated,
Greg

Hi Greg,
Thank you for posting in Windows Server Forum.
You can try the sfc /scannow command to scans the integrity of all protected system files and repairs files with problems when possible. For more details, please refer to the following article.
Sfc
http://technet.microsoft.com/en-us/library/ff950779.aspx
Also perform the clean boot after restarting system and check the status. You can refer
this KB article.
In addition to this, please check below article and KB for additional details.
1. Windows Server 2008 Repair Steps for No Boot Issues
2. Windows Server 2008 R2 hangs at black screen during boot
Hope it helps!
Thanks.
Dharmesh Solanki

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[SOLVED] Black screen after GRUB

Hello everyone
I was setting up a machine with E17 and was trying various DM's since none seemed to work. After attempting to use LightDM, I get a black screen after GRUB. I was trying to read the various logs at /var/log/ but I cannot understand them properly. I tried reinstalling entrance and LightDM with no luck. I even tried editing grub's entry appending '1' or 's' and still no dice. Any help would be appreciated.
Last edited by Linoman (2014-01-20 09:22:33)

Hi tnx for both answers.
I missed something important in Xorg.log. As you can see, fbdev and modesetting aren't loading as usual. I didn't check grub stuff, I don't think it's related, since loading in level 3 (text mode) I get a black screen but I can login as root and turn off the computer blindlessly.
[ 2.969] (II) LoadModule: "modesetting"
[ 2.969] (WW) Warning, couldn't open module modesetting
[ 2.969] (II) UnloadModule: "modesetting"
[ 2.969] (II) Unloading modesetting
[ 2.970] (EE) Failed to load module "modesetting" (module does not exist, 0)
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javex wrote:Post the content of the following files:
Also does disabling LightDM again help resolve the issue, i.e. can you get it to work without LightDM?
No, I can't get it to work changing DM's. I'm not sure if I pacman -Syu before changing DM's another time. Maybe it wasn't LightDM's fault afterall.
Spider.007 wrote:Additionally; try booting without the 'quiet' entry that is in the kernel line by default; and disable https://wiki.archlinux.org/index.php/Ke … de_Setting too
Thanks for pointing out that. I didn't knew I had it on.
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Black Screen after logging in locally to Windows 7 that previously had an open RDP session.

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Hello,
The Windows Desktop Perfmon and Diagnostic tools forum is to discuss performance monitor (perfmon), resource monitor (resmon), and task manager, focusing on HOW-TO, Errors/Problems, and usage scenarios.
As the question is off topic here, I am moving it to the
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When you see answers and helpful posts, please click Vote As Helpful, Propose As Answer, and/or Mark As Answer.
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Lenovo G560 - Issue with won't boot and black screen after HDD upgrade

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Hi Autoexit173,
Welcome to Lenovo Community!
As per the query we understood that you are facing issue with system not booting in your Lenovo G560 laptop.
As you have mentioned that the system not booting, please try to remove the RAM and turn on the system and check if you can hear any beep sound. Also try to clean the RAM slots and check for the issue.
Click here for the steps to remove the RAM and refer page number 40.
Hope this helps. Do post back if issue persists!
Best regards,
Ashwin.S
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Hi
Well, the warranty covers the hardware related problems. It does not cover any issues related to the software.
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[Solved] Amilo XI 2550 - Black screen after fresh install

Dear archlinux users,
I have been reading the archlinux wiki and forums since I started using arch several years ago. It was always possible to solve the problems I ran into by consulting these webpages, therefore a big thanks to the community for the provided help.
Two weeks ago I installed arch on a Fujitsu Siemens Amilo XI 2550. The first problem I ran into was that booting the live-cd resulted in a black screen and I could not even start with installing arch. This problem was solved with the kernel parameter 'nomodeset'.
The first boot of the freshly installed arch also resulted in a black screen after the GRUB menu which was perfectly displayed. After some searching (here and here and ...) I plugged in an external monitor and it showed the login screen. I then installed KDE because I thaught the problem might not show up with X and KDE running. After the login to KDE I realized that the brightness of the laptop display is nearly black but not totally. It seems as if the brightness is at a very low level, but brightness cannot be controlled with the Fn+F8 or Fn+F9 commands. But I see a OSD that indicates that the controls are used but without effect. So at the moment it is only possible to work on the laptop with another display connected to it.
Maybe of use:
ls /sys/class/backlight/
acpi_video0
radeon_bl0
less /sys/class/backlight/acpi_video0/bl_power
0
less /sys/class/backlight/acpi_video0/actual_brightness
7
less /sys/class/backlight/acpi_video0/brightness
7
less /sys/class/backlight/acpi_video0/max_brightness
7
less /sys/class/backlight/radeon_bl0/bl_power
0
less /sys/class/backlight/radeon_bl0/actual_brightness
255
less /sys/class/backlight/radeon_bl0/brightness
255
less /sys/class/backlight/radeon_bl0/max_brightness
255
dmesg | grep drm
[ 0.736559] [drm] Initialized drm 1.1.0 20060810
[ 0.743608] [drm] radeon kernel modesetting enabled.
[ 0.743678] fb: switching to radeondrmfb from VESA VGA
[ 0.744054] [drm] initializing kernel modesetting (RV630 0x1002:0x9583 0x1734:0x1107).
[ 0.744065] [drm] register mmio base: 0xCFEF0000
[ 0.744067] [drm] register mmio size: 65536
[ 0.744172] [drm] Detected VRAM RAM=256M, BAR=256M
[ 0.744174] [drm] RAM width 128bits DDR
[ 0.744257] [drm] radeon: 256M of VRAM memory ready
[ 0.744259] [drm] radeon: 512M of GTT memory ready.
[ 0.744275] [drm] Loading RV630 Microcode
[ 0.744345] [drm] Internal thermal controller without fan control
[ 0.744386] [drm] radeon: power management initialized
[ 0.744389] [drm] GART: num cpu pages 131072, num gpu pages 131072
[ 0.762830] [drm] PCIE GART of 512M enabled (table at 0x0000000000040000).
[ 0.762873] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 0.762874] [drm] Driver supports precise vblank timestamp query.
[ 0.762937] [drm] radeon: irq initialized.
[ 0.794780] [drm] ring test on 0 succeeded in 1 usecs
[ 0.795253] [drm] ib test on ring 0 succeeded in 0 usecs
[ 0.795942] [drm] radeon atom DIG backlight initialized
[ 0.795945] [drm] Radeon Display Connectors
[ 0.795947] [drm] Connector 0:
[ 0.795948] [drm] LVDS-1
[ 0.795950] [drm] DDC: 0xac0 0xac0 0xac4 0xac4 0xac8 0xac8 0xacc 0xacc
[ 0.795951] [drm] Encoders:
[ 0.795952] [drm] LCD1: INTERNAL_LVTM1
[ 0.795953] [drm] Connector 1:
[ 0.795954] [drm] DIN-1
[ 0.795955] [drm] Encoders:
[ 0.795956] [drm] TV1: INTERNAL_KLDSCP_DAC2
[ 0.795957] [drm] Connector 2:
[ 0.795958] [drm] HDMI-A-1
[ 0.795960] [drm] HPD1
[ 0.795961] [drm] DDC: 0x7e50 0x7e50 0x7e54 0x7e54 0x7e58 0x7e58 0x7e5c 0x7e5c
[ 0.795963] [drm] Encoders:
[ 0.795964] [drm] DFP1: INTERNAL_KLDSCP_TMDS1
[ 0.795965] [drm] Connector 3:
[ 0.795966] [drm] VGA-1
[ 0.795968] [drm] DDC: 0x7e40 0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c 0x7e4c
[ 0.795969] [drm] Encoders:
[ 0.795970] [drm] CRT1: INTERNAL_KLDSCP_DAC1
[ 1.278449] [drm] fb mappable at 0xD0141000
[ 1.278451] [drm] vram apper at 0xD0000000
[ 1.278453] [drm] size 9216000
[ 1.278454] [drm] fb depth is 24
[ 1.278455] [drm] pitch is 7680
[ 1.278527] fbcon: radeondrmfb (fb0) is primary device
[ 1.726069] radeon 0000:01:00.0: fb0: radeondrmfb frame buffer device
[ 1.770030] [drm] Initialized radeon 2.39.0 20080528 for 0000:01:00.0 on minor 0
Until now and amongst others I tried the following things.
Using kernel parameters
video.use_native_backlight=1
video.use_native_backlight=0
acpi_osi=linux
acpi_backlight=vendor
and others I just cannot remember.
Masking backlight
systemctl mask systemd-backlight@backlight:acpi_video0.service
systemctl mask systemd-backlight@backlight:radeon_bl0.service
Setting bl_power
echo 1 > /sys/class/backlight/acpi_video0/bl_power
echo 1 > /sys/class/backlight/radeon_bl0/bl_power
Nothing of the above was improving the situation.
Your help on the problem would be highly appreciated.
Best regards
mgs
Last edited by mgs (2014-10-27 10:15:11)

Hello Trilby,
thanks for the reply.
Trilby wrote:If nomodeset worked with the installation medium, why haven't you tried that for the same problem on your installed system?
The kernel parameter 'nomodeset' results in a working display but without X support, due to the fact that with 'nomodeset' there is no KMS support and therefore no X. But nevertheless I tried it and as expected X did not start.
Trilby wrote:Could you also post information about your graphics card and what drivers you've installed.
The graphics card is a Radeon HD 2700 and according to the above dmesg log it is recognized as RV 630. The radeon module is loaded via /etc/mkinitcpio.conf and xf86-video-ati (1:7.5.0-1) is installed.
I hope the provided information is what you asked for, thanks for your help.
Best regards
mgs

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I hope I am posting this in the correct forum area. If not I do apologize.
Here are my specs:
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Use the recovery manager to reinstall the original AMD graphics driver and Catalyst Control center.
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

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