[GUACAMOLE-1369] Cannot connect to older ubuntu versions when glyph cache is disabled

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Not A Bug
• Affects Version/s: 1.3.0
• Component/s: guacamole
• Assignee: Unassigned
• Reporter: Dominik Borkowski
• Created: 21/Jun/21 20:51
• Updated: 21/Jun/21 21:05
• Resolved: 21/Jun/21 21:05

Description

Hello,

Per recommendations from a previous report about disconnects in Windows 7, we disabled glyph cache. Unfortunately, while it fixed windows, it broke some of the older Linux clients (Ubuntu 14.04 & 16.04). Guacamole 1.3.0 fails to connect to xrdp service on those systems with `disable-glyph-caching` set to true. 

Looking at the debug logs we see: 

```
guacd[433]: DEBUG: pduType PDU_TYPE_DATA not properly parsed, 164 bytes remaining unhandled. Skipping.
guacd[433]: DEBUG: CLIPRDR (clipboard redirection) channel connected.
guacd[433]: DEBUG: [0x0a] OpaqueRect - SERVER BUG: The support for this feature was not announced!
guacd[433]: DEBUG: [0x0a] OpaqueRect - SERVER BUG: The support for this feature was not announced!
guacd[433]: DEBUG: [0x0a] OpaqueRect - SERVER BUG: The support for this feature was not announced!
guacd[433]: DEBUG: [0x0a] OpaqueRect - SERVER BUG: The support for this feature was not announced!
guacd[433]: DEBUG: [0x0a] OpaqueRect - SERVER BUG: The support for this feature was not announced!
guacd[433]: DEBUG: [0x0a] OpaqueRect - SERVER BUG: The support for this feature was not announced!
guacd[433]: DEBUG: [0x0a] OpaqueRect - SERVER BUG: The support for this feature was not announced!
guacd[433]: DEBUG: [0x0a] OpaqueRect - SERVER BUG: The support for this feature was not announced!
guacd[433]: DEBUG: [0x0a] OpaqueRect - SERVER BUG: The support for this feature was not announced!
guacd[433]: DEBUG: [0x0a] OpaqueRect - SERVER BUG: The support for this feature was not announced!
guacd[433]: DEBUG: [0x0a] OpaqueRect - SERVER BUG: The support for this feature was not announced!
guacd[433]: DEBUG: [0x0a] OpaqueRect - SERVER BUG: The support for this feature was not announced!
guacd[433]: DEBUG: [0x0a] OpaqueRect - SERVER BUG: The support for this feature was not announced!
guacd[433]: DEBUG: [0x03] Cache Glyph - SERVER BUG: The support for this feature was not announced!
guacd[433]: DEBUG: SECONDARY ORDER [0x03] Cache Glyph failed
guacd[433]: DEBUG: order flags 03 failed
guacd[433]: DEBUG: update_recv_order() failed
guacd[433]: DEBUG: UPDATE_TYPE Orders [0] failed
guacd[433]: DEBUG: DATA_PDU_TYPE_UPDATE - update_recv() failed
guacd[433]: DEBUG: transport_check_fds: transport->ReceiveCallback() - -1
guacd[433]: DEBUG: freerdp_check_fds() failed - 0
guacd[433]: ERROR: Connection closed.
```

Is there any other option we should try to address these clients? While we have hundreds of discrete sessions, our setup relies on a single set of options, so ideally we'd need to identify a set that works for all clients. As a reference, guacamole 1.2.0 works fine with both new and old Linux and Windows versions. 

Thank you!

Issue Links

• relates to: GUACAMOLE-1191 Disable caches which FreeRDP no longer considers supported