Hello,
On Debian (Stable/Jessie), unlocking takes ages (up to 30 minutes!) after DPMS kicked in.
Since our shop is using Debian XFCE along LightDM, the unlocking process is:
- wake up the screen-locker from DPMS on X:1 and provide credentials (this works flawlessly)
- on success, screen-locker passes control back to the user session on X:0 → takes ages (screen remains black with stuck mouse cursor; user can’t even CTRL+ALT+…)
I’ve been struggling with this issue for months. So far:
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Issue showed up on drivers 340.96, disappeared on 352.63 (backported from Experimental at that time) and re-appeared on 367.44 (current official Jessie Backport)
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Issue does not depend on GPU, be it a GT610 (GF119) or a GTX Titan (GK110)
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Issue does not depend on any Xorg configuration I’ve tried: IgnoreDisplayDevices, ConnectedMonitor, UseEDID, IgnoreEDID, etc.
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Issue does not depend on MSI deactivation (NVReg_EnableMSI=0)
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The ONLY way to prevent the issue to appear is not using DPMS, either by “xset -dpms” or in the Xorg configuration
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The only weird sign showing up along this issue is a huge number of “NVIDIA(GPU-0): (): connected” while DPMS is on.
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The issue show up on all ~100 workstations (thus resulting in an extra ~5kW screen power consumption - and wear - at night or when people are away, when DPMS is prevented to kick in)
While not a show-stopper, it still is a nuisance. And we can not go back to 352 since we need Pascal support for our newly-acquired GPU (we’re an academic shop running deep machine learning research 24h/24h, on a computation grid that includes users workstations at night)
Any idea what else I could try to get rid of this issue ?
Or why it disappeared in 352 and re-appeared in 367 ?
Thanks for your help,
Cédric