Bug 69978
| Summary: | Radeon failure with old VGA monitor | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | Alan Cox <alan> | ||||||
| Component: | XFree86 | Assignee: | Mike A. Harris <mharris> | ||||||
| Status: | CLOSED ERRATA | QA Contact: | David Lawrence <dkl> | ||||||
| Severity: | high | Docs Contact: | |||||||
| Priority: | medium | ||||||||
| Version: | 8.0 | CC: | hyu | ||||||
| Target Milestone: | --- | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | i386 | ||||||||
| OS: | Linux | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | 4.2.1-20 | Doc Type: | Bug Fix | ||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2003-05-26 04:57:54 UTC | Type: | --- | ||||||
| Regression: | --- | Mount Type: | --- | ||||||
| Documentation: | --- | CRM: | |||||||
| Verified Versions: | Category: | --- | |||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||
| Embargoed: | |||||||||
| Bug Depends On: | |||||||||
| Bug Blocks: | 79579, 82776 | ||||||||
| Attachments: |
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Description
Alan Cox
2002-07-27 17:27:31 UTC
Created attachment 67366 [details]
Log file
Created attachment 67367 [details]
XF86Config-4
After we examined the sources, etc. I figured I'd write ATI to see if they've got any ideas here. A config file option might be the best way to go. Hui, any thoughts? Date: Tue, 30 Jul 2002 09:23:06 -0400
From: Hui Yu <hyu>
To: Mike A. Harris <mharris>
Cc: alan
Content-Type: multipart/alternative;
boundary="--=_NextPart_ST_09_22_03_Tuesday_July_30_2002_19488"
Subject: RE: Radeon VE not detecting ancient fixed freq VGA monitor
Parts/Attachments:
1 Shown 43 lines Text
2 OK ~81 lines Text
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If I understand correctly, the problem is that the driver quitted with "No
monitor detected!!!" message. If that's the case, it looks like the video
BIOS didn't detect it either (BIOS will use default VGA mode if nothing is
detected). Radeon driver should do the same thing too. Try this:
search for "No monitor detected" in radeon_driver.c, replace the line
followed (return FALSE;) with info->DisplayType = MT_CRT. Then the driver
will try to bring it up to standard 640x480 VGA mode if no sync range given.
Not sure how things will work out with a mono VGA.
A reminder: it's not safe to connect this old monitor with another monitor
on a different head. You might get it killed if you do so.
Hui
I think it would be plausible to add this code bit to the driver disabled by default, but enableable via a config file option. I get default vga mode text on the monitor. That would make sense. This is much worse in phobe2. The installer picks the native driver the screen flashes several times and the machine hangs dead. I implemented a new Radeon driver config file option "ForceLegacyCRT" to implement this change, which defaults to off. It's in XFree86-4.2.99.902-ati-radeon-vga-alan.patch in my XFree86-4.2.99.902-20030218.1 build, but is untested and requires testing on regular Radeon setups to ensure no regressions, as well as on your VGA mono. If it works I'll leave it in for our final release. Please give feedback ASAP. TIA XFree86-4.2.1-11.3 has this backported now, so you can test out the new ForceLegacyCRT option. It's in the internal errata candidate tree for RHL 8.0. Changing bug state to MODIFIED pending testing and final resolution. Please change to RAWHIDE if confirmed fixed, or ASSIGNED if the new option fails. Alan has indicated via email that this option works in rawhide X packages. Since the similar patch is in 4.2.1 errata, closing as ERRATA. |