#728918 xserver-xorg-video-intel: Wrong resolution, Seiki Digital SE50UY04 50-Inch 4K UHD 120Hz LED HDTV not detected #728918
- Package:
- xserver-xorg-video-intel
- Source:
- xserver-xorg-video-intel
- Description:
- X.Org X server -- Intel i8xx, i9xx display driver
- Submitter:
- Fabian Rodriguez
- Date:
- 2023-11-21 04:45:03 UTC
- Severity:
- important
This display is connected through HDMI, I also tested Display Port with the same result. 4K resolution is not detected and is not available in the display configuration tool in Gnome 3. Workaround: Add the display mode manually and enable it with xrandr. The following workaround doesn' t use optimal/accurate refresh rates/frequencies, it seems, and should be used with caution, but I've been using it for several days on such a display without problem (except some lag). Source: http://www.amazon.com/review/R3R4Y6PPZ1QN29/ref=cm_cr_dp_title?ie=UTF8&ASIN=B00BXF7I9M&nodeID=172282&store=electronics Citation: # cvt 3840 2160 13.8 # 3840x2160 13.79 Hz (CVT) hsync: 30.05 kHz; pclk: 144.25 MHz Modeline "3840x2160_13.80" 144.25 3840 3944 4320 4800 2160 2163 2168 2180 -hsync +vsync # xrandr --newmode "3840x2160_13.80" 144.25 3840 3944 4320 4800 2160 2163 2168 2180 -hsync +vsync # xrandr --addmode HDMI1 "3840x2160_13.80" Those make it so you can select it in the Displays or monitors section depending on your distribution (make sure you have the right HDMI port by running xrandr without any arguments). If you don't know where the monitors section is you can run (leave off the quotes): xrandr --output HDMI1 --mode 3840x2160_13.80
I believe when using intel as a user, especially for on-processor graphics like Haswell and Sandy, I got improved driver results when using the latest microcode (video gfx acceleration is one. My i5 4670k processor was new this year, and the latest microcode came out around Aug 2013.. Gfx acceleration wasn't working with the packaged outdated microcode of a few months older, but furthermore in order for me to use proper working Haswell, I had to dive a bit into the testing branch, as intel is making a lot of new work for it's latest HD-capable processors) the command I use iucode-tool -K microcode.dat, microcode.dat is inside tarballed file but is not usable for the microcode service loader without extracting it (you're pretty much extracting the tarball which yields one file, then extracting/pulling an arragenment of binary snippets for different processors from microcode.dat, there's a way to extract just for your processor, if interested for more elaboration, I made a post over here https://plus.google.com/105696767572828808697/posts/fSMY3kT4c3s ) There's also this https://01.org/linuxgraphics/community?qt-projects_aggregated_links=1 ,but I would definitely include the processor type (eg, for me I'm using an intel i5 "4670k".. The processor should be spottable somewhere with dmidecode or cat /proc/cpuinfo (not sure if they can take debian reports) Hopefully this helps :)