This bug also affects me (Ubuntu 10.10beta, x86). It shows itself as periodical hangs for a few seconds, after which following lines were found in syslog: [drm:radeon_dvi_detect] *ERROR* DVI-I-1: probed a monitor but no|invalid EDID [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 128
2sam tygier: thank you, the workaround help. Here is excerpt from lspci -vvnn after setting 'radeon.modeset=0' 01:00.0 VGA compatible controller [0300]: ATI Technologies Inc RV516 [Mobility Radeon X1350] [1002:7196] (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Device [103c:30d7] Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 16 Region 0: Memory at d0000000 (32-bit, prefetchable) [size=128M] Region 1: I/O ports at 2000 [size=256] Region 2: Memory at d8400000 (32-bit, non-prefetchable) [size=64K] [virtual] Expansion ROM at d8420000 [disabled] [size=128K] Capabilities: <access denied> Kernel modules: radeon -- [drm:radeon_dvi_detect] *ERROR* HDMI Type A-1: probed a monitor but no|invalid EDID https://bugs.launchpad.net/bugs/539851 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs