| Priority | medium |
|---|---|
| Bug ID | 75223 |
| Assignee | dri-devel@lists.freedesktop.org |
| Summary | 3840x2160 HDMI 30Hz fails on XFX r7-240a-clh4 and r7-250a-lzh4 |
| Severity | normal |
| Classification | Unclassified |
| OS | Linux (All) |
| Reporter | adam_richter2004@yahoo.com |
| Hardware | x86 (IA32) |
| Status | NEW |
| Version | XOrg CVS |
| Component | DRM/Radeon |
| Product | DRI |
Created attachment 94377 [details]
tar file containing /var/log/Xorg.0.log and logs of dmesg, xrandr, xrandr
--verbose for both cards (r7-240 and r7-250)
The XFX Radeon r7-240a-clh4 and XFX Radeon r7-250a-zlh4 video cards do not seem
to be able to generate 3840x2160 @ 30 Hz video modes over HDMI, even though I
believe their hardware is supposed to be capable of this (~299 MHz pixel
clock).
At least with my se39uy04 39" Seiki television, the Radeon X.org driver happily
passed through the five 3840x2160 @ 24-30 Hz that the television's advertises
in its EDID modes to xrandr, meaning that driver thinks it can support those
video modes, but, if I select any of them, the telvision just says "mode not
support." In comparison, if I make a custom video mode for 3840x2160 @ 15Hz,
the 4k TV displays that fine.
I am attaching a .tar.gz file containting /var/log/Xorg.0.log and logs of
dmesg, xrandr, xrandr --verbose for both cards (r7-240 and r7-250).
Thanks to Alex Deucher for advising me to file this bug report here.
Thanks in advance for any further processing of this bug report.
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