Opened 10 years ago
Last modified 8 years ago
#10327 new bug
Radeon HD6870: DisplayPort shows black screen.
| Reported by: | Bouncer | Owned by: | kallisti5 |
|---|---|---|---|
| Priority: | normal | Milestone: | R1 |
| Component: | Drivers/Graphics/radeon_hd | Version: | R1/Development |
| Keywords: | Cc: | ||
| Blocked By: | Blocking: | ||
| Platform: | x86 |
Description
This follows up your request at the end of ticket 9420.
GCC4 compile, hrev46556. DisplayPort connected monitor (SAMSUNG SyncMaster SA850). After the rocket, a white flash, and then a black screen. Have attached a Syslog.
Attachments (4)
Change History (12)
by , 10 years ago
| Attachment: | syslog.DP.hrev46556.txt added |
|---|
comment:1 by , 10 years ago
The monitor is connected with a full DP cable. No implicit conversions to alternate plugs (eg: DVI).
comment:2 by , 10 years ago
KERN: radeon_hd: dp_aux_speak: dp_aux_ch flags not zero!
Is definitely the problem there... let me see if I introduced a bug.
comment:3 by , 10 years ago
Have tested with your recent changes. (eg: new build, hrev46567 ) DP still does not work.
comment:4 by , 10 years ago
| Summary: | Radeon 6870: DisplayPort shows black screen. → Radeon HD6870: DisplayPort shows black screen. |
|---|
Tested changes as of hrev46615. DP still does not work. A white flash and then a black screen after the rocket. will attach latest syslog.
by , 10 years ago
| Attachment: | syslog.DP.hrev46615.txt added |
|---|
Syslog for DisplayPort activity, hrev 46615.
comment:5 by , 10 years ago
Don't know if this is relevant or not. The video card is clearly identified as a Radeon HD6870. However, the product was sold under the "Sapphire" brand. Perhaps that manufacturer configured the product in some unique manner.
comment:6 by , 10 years ago
brand doesn't matter. The driver should dynamically adjust how it operates if the vendor makes adjustments due to AtomBIOS
You're seeing the same issue my DisplayPort devices are seeing:
KERN: radeon_hd: dp_setup_connectors 5427 KERN: radeon_hd: dp_setup_connectors: found dp connector on index 0 5428 KERN: radeon_hd: dp_aux_speak: dp_aux_ch flags not zero! 5429 KERN: Last message repeated 3 times. 5430 KERN: radeon_hd: dp_setup_connectors: found dp connector on index 1 5431 KERN: radeon_hd: dp_aux_speak: dp_aux_ch flags not zero! 5432 KERN: Last message repeated 3 times.
dp_aux_speak: dp_aux_ch flags not zero! means we can't communicate over the DP aux data channel meaning we can't get edid data. I'm going to reach out to AMD to see if they have any ideas this afternoon.
comment:7 by , 9 years ago
Any progress? It's been a year now.
I have recently tested with hrev48500 and I still get the black screen upon start-up.
Is there any way I can assist with the testing? I have the capability to cross-compile under Linux and run some tests.
comment:8 by , 8 years ago
I get a blank screen with hrev50464 as well. One of my monitors has an on-screen display that shows it's trying to set "H=36.7 kHz, V=25 Hz" which is out of range.
Radeon R9 295X2, three different DP monitors (two 2560x1440, one 5120x2880).
by , 8 years ago
| Attachment: | syslog.r50465.dp.notworking added |
|---|
Using a 2560x1440 DP monitor, out of range
Syslog for DisplayPort connection (hrev46556)