Arndale: Ubuntu: HDMI: Can only use hard coded resolution. EDID doesn't work
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| Arndale |
Confirmed
|
Low
|
Tushar Behera | ||
| Linaro Ubuntu |
Won't Fix
|
Undecided
|
Unassigned | ||
| linaro-landing-team-samsung |
Confirmed
|
Low
|
Tushar Behera | ||
Bug Description
See https:/
To enable HDMI, we used a work around:
drm_kms_
the parameter will force the resolution. It will work only on monitor that supports this resolution.
For the record, Andy Green's suggestion:
if the problem is failed EDID read, there is a checksum per 128 bytes of EDID, so you will see log info about it.
If it's coming from that direction, check your power arrangements for generating 5V on the HDMI link.
If you're taking the approach to keep it powered down until you check for monitor hpd, be aware monitors may delay hpd assertion from 5V becoming available, for a second or more.
They won't necessarily provide EDID result until after they have signaled back hpd.
If that's related, quick fix is keep the 5V on the HDMI all the time from boot.
| Anmar Oueja (anmar) wrote Re: Can only use hard coded resolution. EDID doesn't work | #1 |
| summary: |
- Hardcoded resolution for HDMI + Can only use hard coded resolution. EDID doesn't work |
| Changed in linaro-landing-team-samsung: | |
| assignee: | nobody → Tushar Behera (tusharbehera) |
| Tushar Behera (tusharbehera) wrote | #2 |
| Changed in linaro-landing-team-samsung: | |
| status: | New → Confirmed |
| importance: | Undecided → Low |
| Changed in arndale: | |
| status: | New → Confirmed |
| importance: | Undecided → Low |
| assignee: | nobody → Tushar Behera (tusharbehera) |
| summary: |
- Can only use hard coded resolution. EDID doesn't work + Arndale: Ubuntu: HDMI: Can only use hard coded resolution. EDID doesn't + work |
| Milosz Wasilewski (mwasilew) wrote | #3 |
| Changed in linaro-ubuntu: | |
| status: | New → Won't Fix |
Tushar: Do we care about this for the Ubuntu member build or hard coded resolution is enough?