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#1 2016-02-26 20:00:11
- utvikl
- Member
- Registered: 2011-07-07
- Posts: 21
How can I debug whats wrong with external HDMI monitor?
Hi
After kernel upgrade from linux-4.3.3-3 my external HDMI moitor on an lenovo laptop with intel chipset (i915)has just stopped working. Downgrading kernel makes it work again, so I don't think the problem is with cable or hardware.
I'm not experienced in debugging a functionalist HDMI monitor so I wonder if someone could share the commands and maybe even a little info on procedure to find out if this is a kernel issue or if it got something to do with X?
Appreciated!
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#2 2016-02-26 20:04:49
- ugjka
- Member
- From: Latvia
- Registered: 2014-04-01
- Posts: 1,952
- Website
Re: How can I debug whats wrong with external HDMI monitor?
Can you check what messages you get with dmesg -w when you plug in the cable?
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#3 2016-02-27 14:50:24
- utvikl
- Member
- Registered: 2011-07-07
- Posts: 21
Re: How can I debug whats wrong with external HDMI monitor?
There are no messages as all. Also when I run arandr it doesn't show the the HDMI as output.
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