Bug 15850
| Summary: | Switcheroo: LVDS on radeon not working after suspend | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | Michał Witkowski (neuro) |
| Component: | Video(DRI - non Intel) | Assignee: | drivers_video-dri |
| Status: | RESOLVED OBSOLETE | ||
| Severity: | normal | CC: | alan |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 2.6.34-rc4 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: | Dmesg after resume with not working LVDS | ||
Created attachment 26139 [details] Dmesg after resume with not working LVDS System: Lenovo Ideapad U330 with Radeon 3450 and Intel 4500MHD Arch Linux current with kernel 2.6.34-rc4 (+switchable graphics). Problem: LVDS doesn't come back after suspend while HDMI does with or without X server. Ways to reproduce: 1. Start into console (init 3) 2. Load modules in this order: i915, radeon, fbcom 3. cat DDIS > $STATE 4. pm-suspend 5. Press any key to resume the system 8. *bam*. LVDS is off (backlight is off, no garbage, no cursor) and HDMI works. Notes: 1. Before using switchable graphics (in Discrete only BIOS setting) suspend resumed cleanly in X and in console. 2. I guess this might have something to do with the order I'm loading the modules 2. My guess is: radeon tries to bring up only LVDS-0 and not LVDS-1. After switcheroo, my LVDS is named LVDS-1 in radeon and LVDS-0 in intel, regardless of which one is used. HDMI is only available in radeon as HDMI-0 and it gets resumed. Will attach dmesg.